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Functional Optical Fiber Sensors Detecting Imperceptible Physical/Chemical Changes for Smart Batteries
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作者 Yiding Li Li Wang +3 位作者 Youzhi Song Wenwei Wang Cheng Lin Xiangming He 《Nano-Micro Letters》 SCIE EI CAS CSCD 2024年第8期268-308,共41页
The battery technology progress has been a contradictory process in which performance improvement and hidden risks coexist.Now the battery is still a“black box”,thus requiring a deep understanding of its internal st... The battery technology progress has been a contradictory process in which performance improvement and hidden risks coexist.Now the battery is still a“black box”,thus requiring a deep understanding of its internal state.The battery should“sense its internal physical/chemical conditions”,which puts strict requirements on embedded sensing parts.This paper summarizes the application of advanced optical fiber sensors in lithium-ion batteries and energy storage technologies that may be mass deployed,focuses on the insights of advanced optical fiber sensors into the processes of one-dimensional nano-micro-level battery material structural phase transition,electrolyte degradation,electrode-electrolyte interface dynamics to three-dimensional macro-safety evolution.The paper contributes to understanding how to use optical fiber sensors to achieve“real”and“embedded”monitoring.Through the inherent advantages of the advanced optical fiber sensor,it helps clarify the battery internal state and reaction mechanism,aiding in the establishment of more detailed models.These advancements can promote the development of smart batteries,with significant importance lying in essentially promoting the improvement of system consistency.Furthermore,with the help of smart batteries in the future,the importance of consistency can be weakened or even eliminated.The application of advanced optical fiber sensors helps comprehensively improve the battery quality,reliability,and life. 展开更多
关键词 Smart battery Advanced embedded optical fiber sensor Battery internal physical/chemical state Quality-reliability-life characteristic
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Quantitative Identification of Delamination Damage in Composite Structure Based on Distributed Optical Fiber Sensors and Model Updating
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作者 Hao Xu Jing Wang +3 位作者 Rubin Zhu Alfred Strauss Maosen Cao Zhanjun Wu 《Structural Durability & Health Monitoring》 EI 2024年第6期785-803,共19页
Delamination is a prevalent type of damage in composite laminate structures.Its accumulation degrades structural performance and threatens the safety and integrity of aircraft.This study presents a method for the quan... Delamination is a prevalent type of damage in composite laminate structures.Its accumulation degrades structural performance and threatens the safety and integrity of aircraft.This study presents a method for the quantitative identification of delamination identification in composite materials,leveraging distributed optical fiber sensors and a model updating approach.Initially,a numerical analysis is performed to establish a parameterized finite element model of the composite plate.Then,this model subsequently generates a database of strain responses corresponding to damage of varying sizes and locations.The radial basis function neural network surrogate model is then constructed based on the numerical simulation results and strain responses captured from the distributed fiber optic sensors.Finally,a multi-island genetic algorithm is employed for global optimization to identify the size and location of the damage.The efficacy of the proposed method is validated through numerical examples and experiment studies,examining the correlations between damage location,damage size,and strain responses.The findings confirm that the model updating technique,in conjunction with distributed fiber optic sensors,can precisely identify delamination in composite structures. 展开更多
关键词 Composite structures fiber optic sensor damage identification model updating surrogate model
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Optical micro/nanofiber enabled tactile sensors and soft actuators:A review
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作者 Lei Zhang Yuqi Zhen Limin Tong 《Opto-Electronic Science》 2024年第8期13-29,共17页
As a combination of fiber optics and nanotechnology,optical micro/nanofiber(MNF)is considered as an important multifunctional building block for fabricating various miniaturized photonic devices.With the rapid progres... As a combination of fiber optics and nanotechnology,optical micro/nanofiber(MNF)is considered as an important multifunctional building block for fabricating various miniaturized photonic devices.With the rapid progress in flexible optoelectronics,MNF has been emerging as a promising candidate for assembling tactile sensors and soft actuators owing to its unique optical and mechanical properties.This review discusses the advances in MNF enabled tactile sensors and soft actuators,specifically,focusing on the latest research results over the past 5 years and the applications in health monitoring,human-machine interfaces,and robotics.Future prospects and challenges in developing flexible MNF devices are also presented. 展开更多
关键词 flexible opto-electronic devices tactile sensors soft actuators optical micro/nanofibers
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Optical sensor for BTEX detection:Integrating machine learning for enhanced sensing
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作者 Mary Hashemitaheri Ebrahim Ebrahimi +1 位作者 Geethanga de Silva Hamed Attariani 《Advanced Sensor and Energy Materials》 2024年第3期43-49,共7页
Optical sensors provide a fast and real-time approach to detect benzene,toluene,ethylbenzene,and xylenes(BTEX)in environmental monitoring and industrial safety.However,detecting the concentration of a particular gas i... Optical sensors provide a fast and real-time approach to detect benzene,toluene,ethylbenzene,and xylenes(BTEX)in environmental monitoring and industrial safety.However,detecting the concentration of a particular gas in a mixture can be challenging.Here,we develop a machine-learning model that can precisely measure BTEX concentrations simultaneously based on an absorption spectroscopy gas sensing system.The convolutional neural network(CNN)is utilized to identify the absorbance spectra for each volatile,along with their concentrations in a mixture.A synthetic data set is generated using a series of physics-based simulations to create the predictive model.The data set consists of the overall absorbance of numerous random BTEX mixtures over time,based on various percentages of the permissible exposure limit(PEL).It is worth noting that benzene has a negligible absorbance(very low PEL,1–5 ppm)compared to other volatile gases,which makes it difficult to detect.To address this challenge,we introduce a 3-stage solution to accurately discriminate between all BTEX species,regardless of their concentration levels.As a result,the R-squared above 0.99 for toluene,ethylbenzene,and oxylene,and the R-squared above 0.96 for benzene,is achieved,indicating the model's capability to predict BTEX concentrations. 展开更多
关键词 optical sensor BTEX detection Convolutional neural networks Deep learning
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Waveguide-integrated optical modulators with two-dimensional materials
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作者 Haitao Chen Hongyuan Cao +2 位作者 Zejie Yu Weike Zhao Daoxin Dai 《Journal of Semiconductors》 EI CAS CSCD 2023年第11期8-25,共18页
Waveguide-integrated optical modulators are indispensable for on-chip optical interconnects and optical computing.To cope with the ever-increasing amount of data being generated and consumed,ultrafast waveguide-integr... Waveguide-integrated optical modulators are indispensable for on-chip optical interconnects and optical computing.To cope with the ever-increasing amount of data being generated and consumed,ultrafast waveguide-integrated optical modulators with low energy consumption are highly demanded.In recent years,two-dimensional(2D)materials have attracted a lot of attention and have provided tremendous opportunities for the development of high-performance waveguide-integrated optical modulators because of their extraordinary optoelectronic properties and versatile compatibility.This paper reviews the state-of-the-art waveguide-integrated optical modulators with 2D materials,providing researchers with the developing trends in the field and allowing them to identify existing challenges and promising potential solutions.First,the concept and fundamental mechanisms of optical modulation with 2D materials are summarized.Second,a review of waveguide-integrated optical modulators employing electro-optic,all-optic,and thermo-optic effects is provided.Finally,the challenges and perspectives of waveguide-integrated modulators with 2D materials are discussed. 展开更多
关键词 optical modulation two-dimensional(2D)materials ON-CHIP WAVEGUIDE
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Temperature sensor based on polymer thin film optical waveguide
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作者 王龙德 张彤 +2 位作者 张晓阳 李若舟 汪鲁宁 《Journal of Southeast University(English Edition)》 EI CAS 2013年第2期152-157,共6页
Based on attenuated total reflection (ATR) and thermo-optic effect, the polymeric thin film planar optical waveguide is used as the temperature sensor, and the factors influencing the sensitivity of the temperature ... Based on attenuated total reflection (ATR) and thermo-optic effect, the polymeric thin film planar optical waveguide is used as the temperature sensor, and the factors influencing the sensitivity of the temperature sensor are comprehensively analyzed. Combined with theoretical analysis and experimental investigation, the sensitivity of the temperature sensor is related to the thicknesses of the upper cladding layer, the waveguide layer, the optical loss of the polymer material and the guided wave modes. The results show that the slope value about reflectivity and temperature, which stands for the sensitivity of the polymer thin film temperature sensor, is associated with the waveguide film thickness and the guided wave modes, and the slope value is the highest in the zero reflectance of a certain transverse electric (TE) mode. To improve the sensitivity of the temperature sensor, the sensor's working incident light exterior angle α should be chosen under a certain TE mode with the reflectivity to be zero. This temperature sensor is characterized by high sensitivity and simple structure and it is easily fabricated. 展开更多
关键词 temperature sensor planar optical waveguide guided wave mode thermo-optic effect prism coupling
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AN OPTICAL FIBER SENSOR TECHNIQUE BASED ON SLIGHT DISTURBANCE RADIATION LOSS OF STOCHASTIC WALL
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作者 赵志敏 张永梅 林有义 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 1997年第2期126-130,共5页
This paper presents an optical sensor technique used in the damage evaluation which is formed by structurally integrated fiber optic reticulate sensors embedded in the composite materials. The fibers are processed by ... This paper presents an optical sensor technique used in the damage evaluation which is formed by structurally integrated fiber optic reticulate sensors embedded in the composite materials. The fibers are processed by chemical method and their outsides are peeled to form particles of irregular distribution and they differ in size, so the slight disturbance range of stochastic wall are formed in fibers. According to the characteristics of power loss of waveguide mode caused by slight disturbance of stochastic wall and radiative mode transmission, the range of slight disturbance of stochastic wall may be served as the sensitive range of the sensor. On the basis of theory of slight disturbance of stochastic wall of planar optical waveguide, the relation between the corrosion time and the opposite power loss by experiments is investigated. In this paper, the measurement results of object of SIFORS are also presented. The results show that the optical sensor technique may be used in the damage evaluation of an aircraft. 展开更多
关键词 composite materials optical fibers optical fiber sensor planar optical waveguide stochastic wall slight disturbance damage evaluation
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Cyclodextrin Polymer Films Optical Waveguide Sensor for Volatile Organic Gas Detection 被引量:6
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作者 YASIN Patime YIMIT Abliz +1 位作者 RAHMAN Ebeyla NIZAMIDIN Patima 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2012年第4期682-685,共4页
A sensitive optical waveguide(OWG) sensor which can be used to detect volatile organic compounds(VOCs) was presented.The sensing device(element) was fabricated by means of the immobilization of polyvinyl pyrroli... A sensitive optical waveguide(OWG) sensor which can be used to detect volatile organic compounds(VOCs) was presented.The sensing device(element) was fabricated by means of the immobilization of polyvinyl pyrrolidone(PVP)-cyclodextrin(CD) composite film over a single-mode potassium ion exchanged glass OWG via spin-coating method.The sensor shows higher response to styrene gas than to other VOCs and displays a linear response to styrene gas in a range of 1―1000 μL/L. 展开更多
关键词 optical waveguide gas sensor CYCLODEXTRIN Volatile organic compound
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Multifunctional flexible optical waveguide sensor: on the bioinspiration for ultrasensitive sensors development 被引量:6
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作者 Arnaldo Leal-Junior Leticia Avellar +3 位作者 Vitorino Biazi M.Simone Soares Anselmo Frizera Carlos Marques 《Opto-Electronic Advances》 SCIE EI CAS 2022年第10期1-11,共11页
This paper presents the development of a bioinspired multifunctional flexible optical sensor(BioMFOS)as an ultrasensitive tool for force(intensity and location)and orientation sensing.The sensor structure is bioinspir... This paper presents the development of a bioinspired multifunctional flexible optical sensor(BioMFOS)as an ultrasensitive tool for force(intensity and location)and orientation sensing.The sensor structure is bioinspired in orb webs,which are multifunctional devices for prey capturing and vibration transmission.The multifunctional feature of the structure is achieved by using transparent resins that present both mechanical and optical properties for structural integrity and strain/deflection transmission as well as the optical signal transmission properties with core/cladding configuration of a waveguide.In this case,photocurable and polydimethylsiloxane(PDMS)resins are used for the core and cladding,respectively.The optical transmission,tensile tests,and dynamic mechanical analysis are performed in the resins and show the possibility of light transmission at the visible wavelength range in conjunction with high flexibility and a dynamic range up to 150 Hz,suitable for wearable applications.The BioMFOS has small dimensions(around 2 cm)and lightweight(0.8 g),making it suitable for wearable application and clothing integration.Characterization tests are performed in the structure by means of applying forces at different locations of the structure.The results show an ultra-high sensitivity and resolution,where forces in theμN range can be detected and the location of the applied force can also be detected with a sub-millimeter spatial resolution.Then,the BioMFOS is tested on the orientation detection in 3D plane,where a correlation coefficient higher than 0.9 is obtained when compared with a gold-standard inertial measurement unit(IMU).Furthermore,the device also shows its capabilities on the movement analysis and classification in two protocols:finger position detection(with the BioMFOS positioned on the top of the hand)and trunk orientation assessment(with the sensor integrated on the clothing).In both cases,the sensor is able of classifying the movement,especially when analyzed in conjunction with preprocessing and clustering techniques.As another wearable application,the respiratory rate is successfully estimated with the BioMFOS integrated into the clothing.Thus,the proposed multifunctional device opens new avenues for novel bioinspired photonic devices and can be used in many applications of biomedical,biomechanics,and micro/nanotechnology. 展开更多
关键词 optical sensors optical waveguides bioinspired design multifunctional structures wearable sensors
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Highly sensitive digital optical sensor with large measurement range based on the dual-microring resonator with waveguide-coupled feedback 被引量:3
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作者 向星烨 王葵如 +3 位作者 苑金辉 晋博源 桑新柱 余重秀 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第3期284-288,共5页
We propose a novel high-performance digital optical sensor based on the Mach-Zehnder interferential effect and the dual-microring resonators with the waveguide-coupled feedback. The simulation results show that the se... We propose a novel high-performance digital optical sensor based on the Mach-Zehnder interferential effect and the dual-microring resonators with the waveguide-coupled feedback. The simulation results show that the sensitivity of the sensor can be orders of magnitude higher than that of aconventional sensor, and high quality factor is not critical in it. Moreover, by optimizing the length of the feedback waveguide to be equal to the perimeter of the ring, the measurement range of the proposed sensor is twice as much as that of the conventional sensor in the weak coupling case. 展开更多
关键词 optical sensor microring resonator high sensitivity large measurement range
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Optical temperature sensor based on up-conversion fluorescence emission in Yb^(3+):Er^(3+) co-doped ceramics glass 被引量:5
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作者 徐伟 李成仁 +1 位作者 曹保胜 董斌 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第12期526-529,共4页
yb^3+:Er^3+ co-doped oxy-fluoride ceramics glass has been prepared. The mechanism of up-conversion emissions about Er^3+ was discussed, and the temperature properties of green up-conversion fluorescence between 30... yb^3+:Er^3+ co-doped oxy-fluoride ceramics glass has been prepared. The mechanism of up-conversion emissions about Er^3+ was discussed, and the temperature properties of green up-conversion fluorescence between 303 and 823 K were investigated. The results show that the sensitivity of this sample reaches its maximum value, about 0.0047 K^-1, when the temperature is 383 K, indicating that this kind of sample can be used as high temperature and high sensitivity optical temperature sensor. 展开更多
关键词 yb^3+:Er^3+ co-doped ceramics glass up-conversion emission optical temperature sensor
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An Optical Pressure Sensor Based on MEMS 被引量:2
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作者 Tong Zhang Sheng Qiang +2 位作者 Frank Lewis Yalin Wu Xiaozhu Chi 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2006年第A03期476-478,共3页
An optical fiber pressure sensor has been developed for the measurement in human body.The sensing element is possessed of a membrane structure,which is fabricated by micromachining.The fabrication process includes ani... An optical fiber pressure sensor has been developed for the measurement in human body.The sensing element is possessed of a membrane structure,which is fabricated by micromachining.The fabrication process includes anisotropic wet etching on the silicon wafer.For the transmitting source and signal light,a multimode optical fiber 50/125 μm (core/clad)in diameter was used.The intensity of the light reflected back into the fiber varies with the membrane deflection,which is s function of pressure.The deflection of the membrane by applied pressure can be mathematically described. 展开更多
关键词 optical fiber pressure sensor MEMS
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The research of optical windows used in aircraft sensor systems 被引量:2
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作者 周峰 李岩 汤天瑾 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第6期183-187,共5页
The optical windows used in aircrafts protect their imaging sensors from environmental effects. Considering the imaging performance, flat surfaces are traditionally used in the design of optical windows. For aircrafts... The optical windows used in aircrafts protect their imaging sensors from environmental effects. Considering the imaging performance, flat surfaces are traditionally used in the design of optical windows. For aircrafts operating at high speeds, the optical windows should be relatively aerodynamic, but a flat optical window may introduce unacceptably high drag to the airframes. The linear scanning infrared sensors used in aircrafts with, respectively, a flat window, a spherical window and a toric window in front of the aircraft sensors are designed and compared. Simulation results show that the optical design using a toric surface has the integrated advantages of field of regard, aerodynamic drag, narcissus effect, and imaging performance, so the optical window with a toric surface is demonstrated to be suited for this application. 展开更多
关键词 optical window aircraft sensor narcissus effect toric surface
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An Optical Fiber Sensor Probe Using a PMMA/CPR Coated Bent Optical Fiber as a Transducer for Monitoring Trace Ammonia 被引量:3
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作者 Yu Huang Shiquan Tao 《Journal of Sensor Technology》 2011年第2期29-35,共7页
Ammonia sensors have broad spectrum of applications for industrial process control as well as for environ-mental monitoring. An optical fiber ammonia sensor probe has been developed by using a bent optical fiber havin... Ammonia sensors have broad spectrum of applications for industrial process control as well as for environ-mental monitoring. An optical fiber ammonia sensor probe has been developed by using a bent optical fiber having dual poly(methyl methacrylate) (PMMA)/chlorophenol red (CPR) coatings as a transducer. This sen-sor probe was tested for monitoring trace ammonia in gas samples using air as sample matrix. The reaction of ammonia with CPR causes a color change of the reagent, which was detected by using fiber optic evanes-cent wave absorption spectrometry as a sensing signal. By adopting a dual layer coating structure, the sensor probe has faster response compared to a sensor using a broadly accepted sensing reagent-immobilized poly-mer coating structure. The sensor developed in this work is sensitive, has a detection limit of 2.7 ppb NH3 in air, which is the most sensitive among the reported optical fiber ammonia sensors to the best knowledge of the authors. The sensor is also reversible and has a response time of 25 minutes. The features of high sensi-tivity, reversibility and reasonable response time make this sensor technique very attractive for air quality monitoring. 展开更多
关键词 optical Fiber Chemical sensor AMMONIA sensor CHLOROPHENOL Red Air Quality MONITORING
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Optical Fiber Grating Sensor for Force Measurement of Anchor Cable 被引量:2
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作者 JIANG Desheng FU Jinghua +2 位作者 LIU Shengchun SUI Lingfeng FU Rong 《Wuhan University Journal of Natural Sciences》 EI CAS 2006年第3期662-666,共5页
The development of the sensor suitable for measuring large load stress to the anchor cable becomes an important task in bridge construction and maintenance. Therefore, a new type of optical fiber sensor was developed ... The development of the sensor suitable for measuring large load stress to the anchor cable becomes an important task in bridge construction and maintenance. Therefore, a new type of optical fiber sensor was developed in the laboratory - optical fiber grating sensor for force measurement of anchor cable (OFBFMAC). No similar report about this kind of sensor has been found up to now in China and other countries. This sensor is proved to be an effective way of monitoring in processes of anchor cable installation, cable cutting, cable force regulation, etc, with the accurate and repeatable measuring results. Its successful application in the tie bar cable force safety monitoring for Wuhan Qingchuan bridge is a new exploration of optical fiber grating sensing technology in bridge tie bar monitoring system. 展开更多
关键词 new type of optical fiber sensor anchor cable tie bar cable force health condition OFBFMAC
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A Fiber Optic Sensor for 2,4-dichlorophenol Analysis based on Optical Composite Oxygen-sensitive Film 被引量:3
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作者 TONG Yilin ZENG Zhihong +2 位作者 YU Kan BAO Jiaqi YIN Juanjuan 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2020年第4期743-749,共7页
A novel fiber optic sensor based on optical composite oxygen-sensitive film was developed for determination of 2,4-dichlorophenol(DCP).The optical composite oxygen-sensitive film consists of tris(2,2’-bipyridyl)dichl... A novel fiber optic sensor based on optical composite oxygen-sensitive film was developed for determination of 2,4-dichlorophenol(DCP).The optical composite oxygen-sensitive film consists of tris(2,2’-bipyridyl)dichloro ruthenium(II)hexahydrate(Ru(bpy)3Cl2)as the fluorescence indicator and iron(III)tetrasulfophthalocyanine(Fe(III)PcTs)as bionic enzyme.A lock-in amplifier was used for detecting the lifetime of the composite oxygen-sensitive film by measuring the phase delay of the sensor head.The different variables affecting the sensor performance were evaluated and optimized.Under the optimal conditions(i e,pH 6.0,25℃,Fe(III)PcTs concentration of 5.0×10^-5 mol/L),the linear detection range,detection limit and response time of the fiber optic sensor are 3.0×10^-7-9.0×10^-5 mol/L,4.8×10^-8 mol/L(S/N=3),and 220 s,respectively.The sensor displays high selectivity,good repeatability and stability,which have good potentials in analyzing DCP concentration in practical water samples. 展开更多
关键词 2 4-dichlorophenol optical composite oxygen-sensitive film fiber optic sensor phase delay
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First‑principles study on electronic structure,optical and magnetic properties of rare earth elements X(X=Sc,Y,La,Ce,Eu)doped with two‑dimensional GaSe
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作者 QIU Shenhao XIAO Qingquan +1 位作者 TANG Huazhu XIE Quan 《无机化学学报》 SCIE CAS CSCD 北大核心 2024年第11期2250-2258,共9页
The electronic structure,magnetic,and optical properties of two-dimensional(2D)GaSe doped with rare earth elements X(X=Sc,Y,La,Ce,Eu)were calculated using the first-principles plane wave method based on den-sity funct... The electronic structure,magnetic,and optical properties of two-dimensional(2D)GaSe doped with rare earth elements X(X=Sc,Y,La,Ce,Eu)were calculated using the first-principles plane wave method based on den-sity functional theory.The results show that intrinsic 2D GaSe is a p-type nonmagnetic semiconductor with an indi-rect bandgap of 2.6611 eV.The spin-up and spin-down channels of Sc-,Y-,and La-doped 2D GaSe are symmetric,they are non-magnetic semiconductors.The magnetic moments of Ce-and Eu-doped 2D GaSe are 0.908μ_(B)and 7.163μ_(B),which are magnetic semiconductors.Impurity energy levels appear in both spin-up and spin-down chan-nels of Eu-doped 2D GaSe,which enhances the probability of electron transition.Compared with intrinsic 2D GaSe,the static dielectric constant of the doped 2D GaSe increases,and the polarization ability is strengthened.The ab-sorption spectrum of the doped 2D GaSe shifts in the low-energy direction,and the red-shift phenomenon occurs,which extends the absorption spectral range.The optical reflection coefficient of the doped 2D GaSe is improved in the low energy region,and the improvement of Eu-doped 2D GaSe is the most obvious. 展开更多
关键词 first principle two-dimensional GaSe electronic structure magnetic property optical property
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Application of Optical Hydrogels in Environmental Sensing
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作者 Shuo Yang Shruti Sarkar +2 位作者 Xing Xie Dan Li Jianmin Chen 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2024年第3期311-336,共26页
The ever-increasing complexity of environmental pollutants urgently warrants the development of new detection technologies.Sensors based on the optical properties of hydrogels enabling fast and easy in situ detection ... The ever-increasing complexity of environmental pollutants urgently warrants the development of new detection technologies.Sensors based on the optical properties of hydrogels enabling fast and easy in situ detection are attracting increasing attention.In this paper,the data from 138 papers about different optical hydrogels(OHs)are extracted for statistical analysis.The detection performance and potential of various types of OHs in different environmental pollutant detection scenarios were evaluated and compared to those obtained using the standard detection method.Based on this analysis,the target recognition and sensing mechanisms of two main types of OHs are reviewed and discussed:photonic crystal hydrogels(PCHs)and fluorescent hydrogels(FHs).For PCHs,the environmental stimulus response,target receptors,inverse opal structures,and molecular imprinting techniques related to PCHs are reviewed and summarized.Furthermore,the different types of fluorophores(i.e.,compound probes,biomacromolecules,quantum dots,and luminescent microbes)of FHs are discussed.Finally,the potential academic research directions to address the challenges of applying and developing OHs in environmental sensing are proposed,including the fusion of various OHs,introduction of the latest technologies in various fields to the construction of OHs,and development of multifunctional sensor arrays. 展开更多
关键词 environmental sensors fluorescent hydrogel optical hydrogel photonic crystal hydrogel pollution detection
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NOVEL SPECTRUM ABSORPTION OPTICAL FIBER METHANE SENSOR 被引量:1
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作者 WangShutao CheRensheng 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2005年第2期312-313,共2页
Based on spectrum principle and analyzing the infrared absorption spectrum ofmethane, a kind of optical fiber methane gas sensor and its system are developed. DFBLD(Distributedfeedback laser diode) in 1 300 nm waveban... Based on spectrum principle and analyzing the infrared absorption spectrum ofmethane, a kind of optical fiber methane gas sensor and its system are developed. DFBLD(Distributedfeedback laser diode) in 1 300 nm waveband is used as illuminant and phase-detecting technology isused to carry out harmonic wave detecting the concentration of methane. The sensitivity can arriveat 10^(-5). Experiments results show that the performance targets of the sensor such as sensitivitycan basically satisfy the requests of methane detection. 展开更多
关键词 METHANE Gas detecting optical fiber sensor Harmonic wave detecting
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Multifunctional disk device for optical switch and temperature sensor 被引量:1
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作者 卞振宇 梁瑞生 +3 位作者 张郁靖 易丽璇 赖根 赵瑞通 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第10期518-521,共4页
A multifunctional surface plasmon polariton disk device coupled by two metal-insulator-metal(MIM) waveguides is proposed and investigated numerically with finite-difference time-domain simulation. It can be used as ... A multifunctional surface plasmon polariton disk device coupled by two metal-insulator-metal(MIM) waveguides is proposed and investigated numerically with finite-difference time-domain simulation. It can be used as optical switch and temperature sensor by filling disk with liquid crystal and ethanol, respectively. The simulation results demonstrate that the transmission characteristics of an optical switch can be manipulated by adjusting the radius of disk and the slit width between disk and MIM waveguides. The transmittance and modulation depth of optical switch at 1550 nm are up to 64.82% and 17.70 d B, respectively. As a temperature sensor, its figure of merit can reach 30.46. In this paper, an optical switch with better efficiency and a temperature sensor with better sensitivity can be achieved. 展开更多
关键词 surface plasmon polaritons optical switch modulation depth temperature sensor figure of merit
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