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Simple and universal method in designs of high-efficiency diffractive optical elements for spectrum separation and beam concentration 被引量:2
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作者 徐文琪 林冬风 +8 位作者 许信 叶佳声 王新柯 冯胜飞 孙文峰 韩鹏 张岩 孟庆波 杨国桢 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第7期89-95,共7页
Diffractive optical elements(DOEs) with spectrum separation and beam concentration(SSBC) functions have important applications in solar cell systems. With the SSBC DOEs, the sunlight radiation is divided into seve... Diffractive optical elements(DOEs) with spectrum separation and beam concentration(SSBC) functions have important applications in solar cell systems. With the SSBC DOEs, the sunlight radiation is divided into several wave bands so as to be effectively absorbed by photovoltaic materials with different band gaps. A new method is proposed for designing high-efficiency SSBC DOEs, which is physically simple, numerically fast, and universally applicable. The SSBC DOEs are designed by the new design method, and their performances are analyzed by the Fresnel diffraction integral method.The new design method takes two advantages over the previous design method. Firstly, the optical focusing efficiency is heightened by up to 10%. Secondly, focal positions of all the designed wavelengths can be designated arbitrarily and independently. It is believed that the designed SSBC DOEs should have practical applications to solar cell systems. 展开更多
关键词 diffractive optical element spectrum separation and beam concentration optical focusing efficiency solar cell system
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A single diffractive optical element implementing spectrum-splitting and beam-concentration functions simultaneously with high diffraction efficiency 被引量:2
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作者 叶佳声 王进泽 +3 位作者 黄庆礼 董碧珍 张岩 杨国桢 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第3期44-49,共6页
In this paper,a novel method is proposed and employed to design a single diffractive optical element(DOE) for implementing spectrum-splitting and beam-concentration(SSBC) functions simultaneously.We develop an opt... In this paper,a novel method is proposed and employed to design a single diffractive optical element(DOE) for implementing spectrum-splitting and beam-concentration(SSBC) functions simultaneously.We develop an optimization algorithm,through which the SSBC DOE can be optimized within an arbitrary thickness range according to the limitations of modern photolithography technology.Theoretical simulation results reveal that the designed SSBC DOE has a high optical focusing efficiency.It is expected that the designed SSBC DOE should have practical applications in high-efficiency solar cell systems. 展开更多
关键词 diffractive optical element spectrum-splitting and beam-concentration functions thickness optimization algorithm solar cell systems
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Realizing high photovoltaic efficiency with parallel multijunction solar cells based on spectrum-splitting and-concentrating diffractive optical element 被引量:1
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作者 王进泽 黄庆礼 +7 位作者 许信 全宝钢 罗建恒 张岩 叶佳声 李冬梅 孟庆波 杨国桢 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第5期329-334,共6页
Based on the facts that multijunction solar cells can increase the efficiency and concentration can reduce the cost dramatically, a special design of parallel multijunction solar cells was presented. The design employ... Based on the facts that multijunction solar cells can increase the efficiency and concentration can reduce the cost dramatically, a special design of parallel multijunction solar cells was presented. The design employed a diffractive optical element (DOE) to split and concentrate the sunlight. A rainbow region and a zero-order diffraction region were generated on the output plane where solar cells with corresponding band gaps were placed. An analytical expression of the light intensity distribution on the output plane of the special DOE was deduced, and the limiting photovoltaic efficiency of such parallel multijunction solar ceils was obtained based on Shockley-Queisser's theory. An efficiency exceeding the Shockley--Queisser limit (33%) can be expected using multijunction solar cells consisting of separately fabricated subcells. The results provide an important alternative approach to realize high photovoltaic efficiency without the need for expensive epitaxial technology widely used in tandem solar cells, thus stimulating the research and application of high efficiency and low cost solar cells. 展开更多
关键词 diffractive optical element SPLIT CONCENTRATION MULTIJUNCTION
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Spectrum-Splitting Diffractive Optical Element of High Concentration Factor and High Optical Efficiency for Three-Junction Photovoltaics
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作者 林冬风 全保刚 +8 位作者 张秋琳 张东香 许信 叶佳声 张岩 李冬梅 孟庆波 潘丽 杨国桢 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第9期64-67,共4页
A spectrum-splitting and beam-concentrating (SSBC) diffractive optical element (DOE) for three-junction pho- tovoltaics (PV) system is designed and fabricated by five-circ/e micro-fabrication. The incident solar... A spectrum-splitting and beam-concentrating (SSBC) diffractive optical element (DOE) for three-junction pho- tovoltaics (PV) system is designed and fabricated by five-circ/e micro-fabrication. The incident solar light is efficiently split into three sub-spectrum ranges and strongly concentrated on the focal plane, which can be di- rectly utilized by suitable spectrum-matching solar cells. The system concentration factor reaches 12x. Moreover, the designed wavelengths (450nm, 550nm and 65Onto) are spatially distributed on the focal plane, in good agree- ment with the theoretical results. The average optical effic/ency of all the cells over the three designed wavelengths is 60.07%. The SSBC DOE with a high concentration factor and a high optical efficiency provides a cost-effective approach to achieve higher PV conversion efficieneies. 展开更多
关键词 of on it Spectrum-Splitting diffractive optical element of High Concentration Factor and High optical Efficiency for Three-Junction Photovoltaics is in for DOE been
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Design optimization of highly efficient spectrum-splitting and beam-concentrating diffractive optical element for lateral multijunction solar cells
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作者 王进泽 叶佳声 +4 位作者 黄庆礼 许信 李冬梅 孟庆波 杨国桢 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第4期319-323,共5页
Two improved algorithms are proposed to extend a diffractive optical element (DOE) to work under the broad spec- trum of sunlight. An optimum design has been found for the DOE, with a weighted average optical effici... Two improved algorithms are proposed to extend a diffractive optical element (DOE) to work under the broad spec- trum of sunlight. An optimum design has been found for the DOE, with a weighted average optical efficiency of about 6.8% better than that of the previous design. The optimization of designing high optical efficiency DOEs will pave the way for future designs of high-efficiency, low-cost lateral multijunction solar cells based on such a DOE. 展开更多
关键词 thickness optimization solar cell SPLIT CONCENTRATION diffractive optical element
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Design of Diffractive Optical Elements Used for Beam Shaping in the Fresnel Domain
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作者 FENG Di, YAN Ying-bai, LU Si, TAN Qiao-feng (State Key Lab.of Precis.Measur.Technol.and Instrum.,Dept.of Precis.Instrum.,Tsinghua University,Beijing 100084,CHN) 《Semiconductor Photonics and Technology》 CAS 2003年第2期107-111,共5页
In the Fresnel transform domain, an effective improvement to the conventional iterative algorithm for designing the diffractive optical elements (DOEs) used for spatial beam shaping has been proposed. The algorithm ca... In the Fresnel transform domain, an effective improvement to the conventional iterative algorithm for designing the diffractive optical elements (DOEs) used for spatial beam shaping has been proposed. The algorithm can successfully achieve to design DOEs for beam shaping. Compared with conventional algorithm, this algorithm can provide faster convergence, more powerful ability to overcome local minimum problem and better shaping quality. By computer simulation, the result has shown that the DOEs designed by this algorithm has snch advantages as high uniformity at the main lobe, low profile error and steep edge. 展开更多
关键词 fresnel domain diffractive optical elements beam shaping
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Subwavelength Diffractive Optical Elements
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作者 金国藩 《光学与光电技术》 2006年第5期21-28,共8页
1 Introduction 1.1 Advantages of DOE 1)High diffraction efficiency; 2)Dispersive; 3)More selectivity of designing parameters; 4)More selectivity of primary materials; 5)Can make components miniature,forming array and ... 1 Introduction 1.1 Advantages of DOE 1)High diffraction efficiency; 2)Dispersive; 3)More selectivity of designing parameters; 4)More selectivity of primary materials; 5)Can make components miniature,forming array and integration. 1.2 1.3 megapixel triplet plastic mobile 展开更多
关键词 Design FDTD Subwavelength diffractive optical elements PBS LENGTH DOE TARGET
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A multi-photon(7×7)-focus 3D laser printer based on a 3D-printed diffractive optical element and a 3D-printed multi-lens array
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作者 Pascal Kiefer Vincent Hahn +3 位作者 Sebastian Kalt Qing Sun Yolita M.Eggeler Martin Wegener 《Light(Advanced Manufacturing)》 2024年第1期26-39,共14页
One of the challenges in the field of multi-photon 3D laser printing lies in further increasing the print speed in terms of voxels/s.Here,we present a setup based on a 7×7 focus array(rather than 3×3 in our ... One of the challenges in the field of multi-photon 3D laser printing lies in further increasing the print speed in terms of voxels/s.Here,we present a setup based on a 7×7 focus array(rather than 3×3 in our previous work)and using a focus velocity of about 1 m/s(rather than 0.5 m/s in our previous work)at the diffraction limit(40×/NA1.4 microscope objective lens).Combined,this advance leads to a ten times increased print speed of about 108 voxels/s.We demonstrate polymer printing of a chiral metamaterial containing more than 1.7×10^(12) voxels as well as millions of printed microparticles for potential pharmaceutical applications.The critical high-quality micro-optical components of the setup,namely a diffractive optical element generating the 7×7 beamlets and a 7×7 lens array,are manufactured by using a commercial two-photon grayscale 3D laser printer. 展开更多
关键词 3D laser printing Direct laser writing Multi-photon absorption Multi-focus optics diffractive optical element Lens array
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Diffractive optical elements 75 years on:from micro-optics to metasurfaces 被引量:3
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作者 Qiang Zhang Zehao He +5 位作者 Zhenwei Xie Qiaofeng Tan Yunlong Sheng Guofan Jin Liangcai Cao Xiaocong Yuan 《Photonics Insights》 2023年第4期43-101,共59页
Diffractive optical elements(DOEs)are intricately designed devices with the purpose of manipulating light fields by precisely modifying their wavefronts.The concept of DOEs has its origins dating back to 1948 when D.G... Diffractive optical elements(DOEs)are intricately designed devices with the purpose of manipulating light fields by precisely modifying their wavefronts.The concept of DOEs has its origins dating back to 1948 when D.Gabor first introduced holography.Subsequently,researchers introduced binary optical elements(BOEs),including computer-generated holograms(CGHs),as a distinct category within the realm of DOEs.This was the first revolution in optical devices.The next major breakthrough in light field manipulation occurred during the early 21st century,marked by the advent of metamaterials and metasurfaces.Metasurfaces are particularly appealing due to their ultra-thin,ultra-compact properties and their capacity to exert precise control over virtually every aspect of light fields,including amplitude,phase,polarization,wavelength/frequency,angular momentum,etc.The advancement of light field manipulation with micro/nano-structures has also enabled various applications in fields such as information acquisition,transmission,storage,processing,and display.In this review,we cover the fundamental science,cutting-edge technologies,and wide-ranging applications associated with micro/nano-scale optical devices for regulating light fields.We also delve into the prevailing challenges in the pursuit of developing viable technology for real-world applications.Furthermore,we offer insights into potential future research trends and directions within the realm of light field manipulation. 展开更多
关键词 diffractive optical elements metasurfaces METAMATERIALS
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End-to-end optimization of a diffractive optical element and aberration correction for integral imaging 被引量:1
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作者 Xiangyu Pei Xunbo Yu +4 位作者 Xin Gao Xinhui Xie Yuedi Wang Xinzhu Sang Binbin Yan 《Chinese Optics Letters》 SCIE EI CAS CSCD 2022年第12期12-18,共7页
In the integral imaging light field display, the introduction of a diffractive optical element (DOE) can solve the problem of limited depth of field of the traditional lens. However, the strong aberration of the DOE s... In the integral imaging light field display, the introduction of a diffractive optical element (DOE) can solve the problem of limited depth of field of the traditional lens. However, the strong aberration of the DOE significantly reduces the final display quality. Thus, herein, an end-to-end joint optimization method for optimizing DOE and aberration correction is proposed. The DOE model is established using thickness as the variable, and a deep learning network is built to preprocess the composite image loaded on the display panel. The simulation results show that the peak signal to noise ratio value of the optimized image increases by 8 dB, which confirms that the end-to-end joint optimization method can effectively reduce the aberration problem. 展开更多
关键词 integral imaging diffractive optical element end-to-end optimization deep learning network aberration correction
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Diffractive Optical Elements for Dynamic Optical Coupling
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作者 Changhe Zhou Xin Zhao Liren Liu(Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, P. R. China, Tel: 86-21-59911864,Fax:86-21-59536156, E-mail: chazhou@mail.shcnc.ac.cn) 《光学学报》 EI CAS CSCD 北大核心 2003年第S1期261-262,共2页
Diffractive optical elements such as the complementary Dammann gratings are incorporated for dynamic optical fiber splitting and combining. Experimental results of 1×8 dynamic optical couplings are presented.
关键词 for HAVE of into diffractive optical elements for Dynamic optical Coupling
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Correction of dispersion distortion of femtosecond pulses by using the non-planar surface of diffractive optical elements
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作者 I.V.Minin O.V.Minin 《Chinese Optics Letters》 SCIE EI CAS CSCD 2004年第8期435-437,共3页
Peculiarities of propagation of femtosecond pulses through a focusing diffractive optical element (DOE) are considered. It is shown that the time delay between the pulse and phase wavefronts can be decreased by fabric... Peculiarities of propagation of femtosecond pulses through a focusing diffractive optical element (DOE) are considered. It is shown that the time delay between the pulse and phase wavefronts can be decreased by fabricating the DOE on the optimal curvilinear surface. 展开更多
关键词 Correction of dispersion distortion of femtosecond pulses by using the non-planar surface of diffractive optical elements DOE
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Design of refractive/diffractive hybrid optical elements for beam shaping with large diffraction pattern 被引量:4
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作者 曲卫东 顾华荣 谭峭峰 《Chinese Optics Letters》 SCIE EI CAS CSCD 2016年第3期64-67,共4页
Diffractive optics is an important technique for beam shaping with high light efficiency and strong diffraction pattern flexibility. Since the diffraction angle is limited by the unit size of the diffractive optical e... Diffractive optics is an important technique for beam shaping with high light efficiency and strong diffraction pattern flexibility. Since the diffraction angle is limited by the unit size of the diffractive optical element (DOE), the size of the required diffraction pattern is always rather small. In this Letter, refractive/diffractive hybrid optical elements (RDHOEs) consisting of a DOE and a lens are used to realize beam shaping for a large diffraction pattern. The lens, as the component of the RDHOEs, can not only be concave but also convex, and the double sampling Fresnel diffraction algorithm is developed for the design of these two types of RDHOEs. The simulation and experimental results provide solid evidence to demonstrate the proposed method with the pure phase spatial light modulator. 展开更多
关键词 Diffraction patterns diffractive optical elements INTERFEROMETRY Lenses LIGHT Light modulators
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Zone plate design for generating annular-focused beams 被引量:1
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作者 Yong Chen Lai Wei +3 位作者 Qiang-Qiang Zhang Quan-Ping Fan Zu-Hua Yang Lei-Feng Cao 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第10期250-254,共5页
Annular-focused beams have attracted attention because of their novel properties and applications in optical trapping, high resolution microscopy, and laser-induced periodic surface structuring. Generation of this bea... Annular-focused beams have attracted attention because of their novel properties and applications in optical trapping, high resolution microscopy, and laser-induced periodic surface structuring. Generation of this beam is very important and necessary. In this article, a novel design of zone plate for forming the annular-focused beams is proposed. The design principle is introduced, and the characteristics of zone plate are analyzed by numerical simulation. The result shows that the zone plate can form a monochromatic ring-shaped intensity distribution in the focal plane. And the design method is also generally suitable for designing the other optical elements to generate the annular-focused beams. 展开更多
关键词 zone plate diffractive optical elements annular focused beam laser-induced periolic surface structuring
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RECENT PROGRESS IN MULTIFOCAL MULTIPHOTON MICROSCOPY 被引量:1
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作者 JUNLE QU LIXIN LIU +2 位作者 YONGHONG SHAO HANBEN NIU BRUCE Z.GAO 《Journal of Innovative Optical Health Sciences》 SCIE EI CAS 2012年第3期41-48,共8页
Multifocal multiphoton microscopy(MMM)has recently become an important tool in biomedicine for performing three-dimensional fastfluorescence imaging.Using various beamsplitting techniques,MMM splits the near-infrared ... Multifocal multiphoton microscopy(MMM)has recently become an important tool in biomedicine for performing three-dimensional fastfluorescence imaging.Using various beamsplitting techniques,MMM splits the near-infrared laser beam into multiple beamlets and produces a multifocal array on the sample for parallel multiphoton excitation and then recordsfluorescence signal from all foci simultaneously with an area array detector,which significantly improves the imaging speed of multiphoton microscopy and allows for high efficiency in use of the excitation light.In this paper,we discuss the features of several MMM setups using different beamsplitting devices,including a Nipkow spinning disk,a microlens array,a set of beamsplitting mirrors,or a diffractive optical element(DOE).In particular,we present our recent work on the development of an MMM using a spatial light modulator(SLM). 展开更多
关键词 Multifocal multiphoton microscopy(MMM) microlens array beamsplitter diffractive optical element(DOE) spatial light modulator(SLM)
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Laser beam characteristic for laser resonators with diffraction optical elements 被引量:1
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作者 陆璇辉 黄凯凯 +2 位作者 薛大建 张蕾 何赛灵 《Chinese Optics Letters》 SCIE EI CAS CSCD 2003年第3期153-156,共4页
The matrix eigenvalue method is used to analyze a laser resonator composed of diffraction optical elements. The results show that this type of resonator can separate fundamental mode and high order modes effectively. ... The matrix eigenvalue method is used to analyze a laser resonator composed of diffraction optical elements. The results show that this type of resonator can separate fundamental mode and high order modes effectively. The output beams can be designed for different requests. 展开更多
关键词 MODE on BE of AS for Laser beam characteristic for laser resonators with diffraction optical elements with
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DOE effect on BER performance in MSK space uplink chaotic optical communication 被引量:2
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作者 Mi Li Yuan Chen +2 位作者 Yuejiang Song Cheng Zeng Xuping Zhang 《Chinese Optics Letters》 SCIE EI CAS CSCD 2020年第7期20-27,共8页
With the increasing demand for space optical communication security, space chaotic optical communication has attracted a great amount of attention. Compared with traditional space optical communication, a chaotic opti... With the increasing demand for space optical communication security, space chaotic optical communication has attracted a great amount of attention. Compared with traditional space optical communication, a chaotic optical communication system has a higher bit error rate(BER) for its complex system design. In order to decrease the BER of space chaotic optical communication systems, we introduce two diffractive optical elements(DOEs)at a transmitting terminal(Tx). That is because the commonly used reflective optical antenna at Tx blocks the central part of the transmission beam, which leads to a great amount of power consumption. Introducing the DOEs into the optical subsystem at Tx can reshape the transmission beam from a Gaussian distribution to a hollow Gaussian distribution so that the block of the secondary mirror in the reflective optical antenna can be avoided. In terms of the DOE influence on communication quality, we give a BER model based on a minimumshift-key(MSK) space uplink chaotic optical communication system to describe the DOE function. Based on the model, we further investigate the effect of the DOEs through analyzing the BER relationship versus basic system parameters based on the BER model. Both different mismatch conditions of chaotic systems and different atmospheric turbulence conditions are considered. These results will be helpful for the scheme design of space uplink chaotic optical communication systems. 展开更多
关键词 chaotic-encrypted communication space uplink optical communication atmospheric turbulence effects diffractive optical element design minimum-shift-key bit error rate
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Development of space-based diffractive telescopes 被引量:2
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作者 Wei ZHAO Xin WANG +2 位作者 Hua LIU Zi-feng LU Zhen-wu LU 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2020年第6期884-902,共19页
Membrane diffractive optical elements formed by fabricating microstructures on the substrates have two important characteristics,ultra-light mass(surface mass density<0.1 kg/m2)and loose surface shape tolerances(su... Membrane diffractive optical elements formed by fabricating microstructures on the substrates have two important characteristics,ultra-light mass(surface mass density<0.1 kg/m2)and loose surface shape tolerances(surface accuracy requirements are on the order of magnitude of centimeter).Large-aperture telescopes using a membrane diffractive optical element as the primary lens have super large aperture,light weight,and low cost at launch.In this paper,the research and development on space-based diffractive telescopes are classified and summarized.First,the imaging theory and the configuration of diffractive-optics telescopes are discussed.Then,the developments in diffractive telescopes are introduced.Finally,the development prospects for this technology used as a high-resolution space reconnaissance system in the future are summarized,and the critical and relevant work that China should carry out is put forward. 展开更多
关键词 Membrane diffractive optical elements diffractive telescope Super large aperture
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Holography with high-power CW coherent terahertz source: optical components, imaging, and applications 被引量:1
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作者 Yulia Choporova Boris Knyazev Vladimir Pavelyev 《Light(Advanced Manufacturing)》 2022年第3期103-119,共17页
This paper presents the results of 15 years of studies in the field of terahertz holography at the Novosibirsk free electron laser.They cover two areas:research on obtaining holographic images in the terahertz range a... This paper presents the results of 15 years of studies in the field of terahertz holography at the Novosibirsk free electron laser.They cover two areas:research on obtaining holographic images in the terahertz range and the use of diffractive optical elements to form high-power terahertz radiation fields with specified characteristics(intensity,phase,and polarization),using well-studied and widely applied in the optical range methods of optical(analog),digital,and computer-generated holography.All experiments were performed with the application of high-power coherent monochromatic frequency-tunable radiation from the Novosibirsk free electron laser.The features of hologram registration in the terahertz range are described.Methods,technologies,and optical materials for terahertz holographic elements are discussed.A wide range of promising applications of high-power terahertz fields with a given spatial structure is considered.The results of the study of terahertz holograms recorded as digital holograms,as well as radiation-resistive optical elements realized as computer-synthesized holograms,are presented. 展开更多
关键词 Terahertz range HOLOGRAPHY diffractive optical elements Imaging Free electron laser
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Ferroelectric liquid crystals for fast switchable circular Dammann grating [Invited] 被引量:1
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作者 Qi Guo Tian Liu +5 位作者 Xiaoqian Wang Zhigang Zheng Aleksey Kudreyko Huijie Zhao V.Chigrinov Hoi-Sing Kwok 《Chinese Optics Letters》 SCIE EI CAS CSCD 2020年第8期2-5,共4页
Diffractive optical elements attract a considerable amount of attention, mainly due to their potential applications in imaging coding, optical sensing, etc. Application of ferroelectric liquid crystals(FLCs) with phot... Diffractive optical elements attract a considerable amount of attention, mainly due to their potential applications in imaging coding, optical sensing, etc. Application of ferroelectric liquid crystals(FLCs) with photoalignment technology in diffractive optical elements results in a high efficiency and a fast response time. In this study we demonstrate a circular Dammann grating(CDG) with a diffraction efficiency of 84.5%. The achieved response time of 64 μs is approximately two orders of magnitude faster than the existing response time of nematic liquid crystal devices. By applying a low electric field(V = 6 V) to the FLC CDG, it is switched between the eight-order diffractive state and the transmissive diffraction-free state. 展开更多
关键词 ferroelectric liquid crystals PHOTO-ALIGNMENT fast switching diffractive optical elements
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