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Mode coupling with Fabry-Perot modes in photonic crystal slabs
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作者 秦恳 胡鹏 +2 位作者 刘杰 向红 韩德专 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第8期90-94,共5页
Fabry–Perot(FP)modes are a class of fundamental resonances in photonic crystal(PhC)slabs.Owing to their low quality factors,FP modes are frequently considered as background fields with their resonance nature being ne... Fabry–Perot(FP)modes are a class of fundamental resonances in photonic crystal(PhC)slabs.Owing to their low quality factors,FP modes are frequently considered as background fields with their resonance nature being neglected.Nevertheless,FP modes can play important roles in some phenomena,as exemplified by their coupling with guided resonance(GR)modes to achieve bound states in the continuum(BIC).Here,we further demonstrate the genuine resonance mode capability of FP modes PhC slabs.Firstly,we utilize temporal coupled-mode theory to obtain the transmittance of a PhC slab based on the FP modes.Secondly,we construct exceptional points(EPs)in both momentum and parameter spaces through the coupling of FP and GR modes.Furthermore,we identify a Fermi arc connecting two EPs and discuss the far-field polarization topology.This work elucidates that the widespread FPs in PhC slabs can serve as genuine resonant modes,facilitating the realization of desired functionalities through mode coupling. 展开更多
关键词 Fabry–Perot mode photonic crystal slab mode coupling exceptional point
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Investigation on photonic crystal nanobeam cavity based on mixed diamond–circular holes
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作者 Jingtong Bin Kerui Feng +4 位作者 Shang Ma Ke Liu Yong Cheng Jing Chen Qifa Liu 《Nanotechnology and Precision Engineering》 EI CAS CSCD 2024年第1期63-70,共8页
A photonic crystal nanobeam cavity(M-PCNC)with a structure incorporating a mixture of diamond-shaped and circular air holes is pro-posed.The performance of the cavity is simulated and studied theoretically.Using thefin... A photonic crystal nanobeam cavity(M-PCNC)with a structure incorporating a mixture of diamond-shaped and circular air holes is pro-posed.The performance of the cavity is simulated and studied theoretically.Using thefinite-difference time-domain method,the parameters of the M-PCNC,including cavity thickness and width,lattice constant,and radii and numbers of holes,are optimized,with the quality factor Q and mode volume Vm as performance indicators.Mutual modulation of the lattice constant and hole radius enable the proposed M-PCNC to realize outstanding performance.The optimized cavity possesses a high quality factor Q 1.45105 and an ultra-small mode=×volume Vm 0.01(λ/n)[Zeng et al.,Opt Lett 2023:48;3981–3984]in the telecommunications wavelength range.Light can be progres-=sively squeezed in both the propagation direction and the perpendicular in-plane direction by a series of interlocked anti-slots and slots in the diamond-shaped hole structure.Thereby,the energy can be confined within a small mode volume to achieve an ultra-high Q/Vm ratio. 展开更多
关键词 photonic crystal nanobeam cavity Mixed diamond–circular holes Slots and anti-slots FDTD simulation Quality factor mode volume
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The influence of defects in a plasma photonic crystal on the characteristics of microwave transmittance 被引量:2
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作者 Ronggang WANG Ben LI +2 位作者 Tongkai ZHANG Jiting OUYANG Yurong SUN 《Plasma Science and Technology》 SCIE EI CAS CSCD 2020年第8期41-48,共8页
Plasma photonic crystals(PPCs) have been a hot research topic in the band gap(BG) material field in recent years due to their unique advantages, such as the feasibility of changing the parameters and hence the propert... Plasma photonic crystals(PPCs) have been a hot research topic in the band gap(BG) material field in recent years due to their unique advantages, such as the feasibility of changing the parameters and hence the properties of the materials with respect to traditional photonic crystals(PCs). In this paper,we focus mainly on the effects of some types of defects introduced in PPCs on the changes in BG characteristics of microwave(MW) transmittance. The research is carried out using numerical simulation with a one-dimensional finite-difference time-domain(FDTD) method, and six types of defects, including a lattice-constant defect, radii-ratio defect, additional-column defect, column-width defect, plasma-frequency defect, and electron-collision-frequency defect, are concerned. It transpires that introducing a defect in a PPC in different manners may realize the symmetric change, alternative change, shifting, generating, transforming, disappearing, and attenuating of BGs in transmittance spectra, which has great potential for the manufacture of spatiotemporal-controllable MW materials and devices with more feasible modulating functions. 展开更多
关键词 plasma photonic crystal defect mode MICROWAVE TRANSMITTANCE
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Vertical cavity surface emitting laser transverse mode and polarization control by elliptical hole photonic crystal
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作者 曹田 徐晨 +4 位作者 解意洋 阚强 魏思民 毛明明 陈弘达 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第2期261-264,共4页
The polarization of traditional photonic crystal(PC) vertical cavity surface emitting laser(VCSEL) is uncontrollable,resulting in the bit error increasing easily.Elliptical hole photonic crystal can control the tr... The polarization of traditional photonic crystal(PC) vertical cavity surface emitting laser(VCSEL) is uncontrollable,resulting in the bit error increasing easily.Elliptical hole photonic crystal can control the transverse mode and polarization of VCSEL efficiently.We analyze the far field divergence angle,and birefringence of elliptical hole PC VCSEL.When the ratio of minor axis to major axis b/a = 0.7,the PC VCSEL can obtain single mode and polarization.According to the simulation results,we fabricate the device successfully.The output power is 1.7 mW,the far field divergence angle is less than 10°,and the side mode suppression ratio is over 30 dB.The output power in the Y direction is 20 times that in the X direction. 展开更多
关键词 photonic crystal vertical cavity surface emitting laser(VCSEL) elliptical holes single mode polarization control
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Design and Analysis of Microstrip Multi-Channeled Filter Using Photonic Crystal Branchy Defect
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作者 Li Yunhui Jiang Haitao He Li Li Hongqiang Zhang Yewen Chen Hong 《Journal of Rare Earths》 SCIE EI CAS CSCD 2006年第z1期136-139,共4页
A multi-channeled filter based on branchy defect in a microstrip photonic crystal was proposed. By introducing a branchy structure across the defect region, multiple defect modes will appear inside the photonic gap, l... A multi-channeled filter based on branchy defect in a microstrip photonic crystal was proposed. By introducing a branchy structure across the defect region, multiple defect modes will appear inside the photonic gap, leading to the multi-channeled filtering phenomenon. In comparison with the conventional multi-channeled filters, the proposed structure is more compact and tunable as far as the device volume and fabrication are concerned. The microwave experiment results are found in agreement with simulation results. 展开更多
关键词 photonic crystalS defect mode multi-channeled FILTER
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Light propagation properties of two-dimensional photonic crystal channel filters with elliptical micro-cavities
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作者 冯帅 王义全 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第10期262-266,共5页
Light propagation through a channel filter based on two-dimensional photonic crystals with elliptical-rod defects is studied by the finite-difference time-domain method. Shape alteration of the defects from the usual ... Light propagation through a channel filter based on two-dimensional photonic crystals with elliptical-rod defects is studied by the finite-difference time-domain method. Shape alteration of the defects from the usual circle to an ellipse offers a powerful approach to engineer the resonant frequency of channel filters. It is found that the resonant frequency can be flexibly adjusted by just changing the orientation angle of the elliptical defects. The sensitivity of the resonant wavelength to the alteration of the oval rods' shape is also studied. This kind of multi-channel filter is very suitable for systems requiring a large number of output channel filters. 展开更多
关键词 photonic crystal defect multi-channel filter MICRO-cavity
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Analysis and engineering of coupled cavity waveguides based on coupled-mode theory
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作者 林旭升 陈雄文 兰胜 《Chinese Physics B》 SCIE EI CAS CSCD 2005年第10期2033-2040,共8页
The analytical expression for the transmission spectra of coupled cavity waveguides (CCWs) in photonic crystals (PCs) is derived based on the coupled-mode theory (CMT). Parameters in the analytical expression ca... The analytical expression for the transmission spectra of coupled cavity waveguides (CCWs) in photonic crystals (PCs) is derived based on the coupled-mode theory (CMT). Parameters in the analytical expression can be extracted by simple numerical simulations. We reveal that it is the phase shift between the two adjacent PC defects that uniquely determines the flatness of the impurity bands of CCWs. In addition, it is found that the phase shift also greatly affects the bandwidth of CCWs. Thus, the engineering of the impurity bands of CCWs can be realized through the adjustment of the phase shift. Based on the theoretical results, an interesting phenomenon in which a CCW acts as a single PC defect and its impurity band possesses a Lorentz lineshape is predicted. Very good agreement between the analytical results and the numerical simulations based on transfer matrix method has been achieved. 展开更多
关键词 photonic crystals coupled cavity waveguides coupled-mode theory phase shift
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One-dimensional structure made of periodic slabs of SiO2/InSb offering tunable wide band gap at terahertz frequency range 被引量:1
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作者 Sepehr Razi Fatemeh Ghasemi 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第12期170-179,共10页
Optical features of a semiconductor–dielectric photonic crystal are studied theoretically. Alternating layers of micrometer sized SiO2/In Sb slabs are considered as building blocks of the proposed ideal crystal. By i... Optical features of a semiconductor–dielectric photonic crystal are studied theoretically. Alternating layers of micrometer sized SiO2/In Sb slabs are considered as building blocks of the proposed ideal crystal. By inserting additional layers and disrupting the regularity, two more defective crystals are also proposed. Photonic band structure of the ideal crystal and its dependence on the structural parameters are explored at the first step. Transmittance of the defective crystals and its changes with the thicknesses of the layers are studied. After extracting the optimum values for the thicknesses of the unit cells of the crystals, the optical response of the proposed structures at different temperatures and incident angles are investigated. Changes of the defect layers’ induced mode(s) are discussed by taking into consideration of the temperature dependence of the In Sb layer permittivity. The results clearly reflect the high potential of the proposed crystals to be used at high temperature terahertz technology as a promising alternative to their electronic counterparts. 展开更多
关键词 photonic band gap photonic crystal semiconductor layer defect mode
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Design of an air-slot mode-gap nanocavity in a two dimensional photonic crystal slab 被引量:1
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作者 REN Cheng KANG Feng +3 位作者 GAN Lin FENG Shuai CHENG LiFeng LI ZhiYuan 《Chinese Science Bulletin》 SCIE EI CAS 2013年第1期63-67,共5页
We present a novel and simple design of an air-slot mode-gap photonic crystal(PC) nanocavity by introducing a linear air slot to the center of a line-defect waveguide in a two dimensional triangular-lattice silicon PC... We present a novel and simple design of an air-slot mode-gap photonic crystal(PC) nanocavity by introducing a linear air slot to the center of a line-defect waveguide in a two dimensional triangular-lattice silicon PC slab.A high quality factor(Q factor) of 8.42*105 and an ultrasmall mode volume of 0.998 cubic wavelength are achieved in an optimized air-slot nanocavity which is a suitable choice for the strong matter-field interaction in free space.The high Q cavities with ultrasmall mode volume are important for applications such as quantum computation and nonlinear optics. 展开更多
关键词 二维光子晶体 空气槽 腔设计 非线性光学 差距 高品质因数 强相互作用 自由空间
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Influence of incident angle on the defect mode of locally doped photonic crystal 被引量:1
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作者 王瑾 温廷敦 +1 位作者 许丽萍 刘祖凡 《Journal of Semiconductors》 EI CAS CSCD 2013年第11期11-14,共4页
By means of a transfer matrix method, this paper deduces the transmittance calculation equation of light travelling in locally doped (including one defect layer) mirror heterostructure (ABCCBA)PD(ABCCBA)q photon... By means of a transfer matrix method, this paper deduces the transmittance calculation equation of light travelling in locally doped (including one defect layer) mirror heterostructure (ABCCBA)PD(ABCCBA)q photonic crystals. In the cases of defect layers being either introduced or not introduced, an ORIGIN simulation shows the influence of incident angle change on the number of photon band gap, bandwidth and defect mode numbers. Studies indicate that when such photonic crystals have 8 mirror cycles and the thickness of defect layer D meets nDdD = X0/2 or nodD = 4)~0, the photonic crystal defect mode transmission peak changes significantly. Also, with the change of incident angle, the number of defect mode transmission peaks changes. By altering incident angle and defect layer thickness, we can get photon band gaps and defect mode transmission peaks at different frequency domains and different relative angular frequencies. This provides theoretical reference for achieving light wave multi-channel filtering and tunable filtering. 展开更多
关键词 photonic crystal defect mode incident angle locally doped transfer matrix method
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Properties of single and multiple defect modes in one-dimensional photonic crystals containing left-handed metamaterials 被引量:1
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作者 Munazza Zulfiqar Ali 《Chinese Optics Letters》 SCIE EI CAS CSCD 2012年第7期69-72,共4页
Wave propagation is studied in structures consisting of alternate left- and right-handed layers. Bragg gap and zero-n gap appear in different frequency regions of the structure. The periodicity of the structure is bro... Wave propagation is studied in structures consisting of alternate left- and right-handed layers. Bragg gap and zero-n gap appear in different frequency regions of the structure. The periodicity of the structure is broken by simply reversing the order of the layers in one half of the structure, resulting in defect modes located inside the zero-n gap and Bragg gap. These modes can be made very narrow by adding more layers in the structure. The defect mode located inside the zero-n gap is sensitive to the symmetry of the structure and insensitive to the angle of incidence of the incoming radiation. Multiple modes are also generated inside the gaps by repeating the structural pattern. Thus, a simple structure can be used for single and multiple modes that are imDortant for different applications. 展开更多
关键词 mode Properties of single and multiple defect modes in one-dimensional photonic crystals containing left-handed metamaterials LEFT
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基于微波光子晶体的温度传感方法研究
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作者 梅永 王浩志 《信息技术》 2024年第11期16-20,27,共6页
针对基于电子技术的测温传感器灵敏度低、尺寸大和易受环境影响等缺陷,提出一种基于镜像型一维微波光子晶体模型的温度测量方法。利用传输矩阵法计算了一维缺陷微波光子晶体在不同环境温度条件下的带隙和缺陷峰频谱,建立了缺陷峰波长或... 针对基于电子技术的测温传感器灵敏度低、尺寸大和易受环境影响等缺陷,提出一种基于镜像型一维微波光子晶体模型的温度测量方法。利用传输矩阵法计算了一维缺陷微波光子晶体在不同环境温度条件下的带隙和缺陷峰频谱,建立了缺陷峰波长或缺陷峰偏波长移量与环境温度之间的关系;通过自由空间法测量缺陷峰波长在待测温度条件下的缺陷峰波长或其偏移量,则可以反演环境温度。结果表明,该温度测量方法具有较好的温度传感灵敏度和较大的温度测度范围,为设计微波传感器提供了一种新理论和实践案例。 展开更多
关键词 微波光子晶体 缺陷模 传输矩阵法 温度传感 灵敏度
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High efficiency filtering using two-dimensional photonic crystal coupled cavity structures 被引量:2
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作者 王会波 王金生 +1 位作者 李文慧 丁卫强 《Chinese Optics Letters》 SCIE EI CAS CSCD 2008年第6期431-433,共3页
Transmission spectra of coupled cavity structures (CCSs) in two-dimensional (2D) photonic crystals (PCs) are investigated using a coupled mode theory, and an optical filter based on CCS is proposed. The performa... Transmission spectra of coupled cavity structures (CCSs) in two-dimensional (2D) photonic crystals (PCs) are investigated using a coupled mode theory, and an optical filter based on CCS is proposed. The performance of the filter is investigated using finite-difference time-domain (FDTD) method, and the results show that within a very short coupling distance of about 3λ, where ), is the wavelength of signal in vacuum, the incident signals with different frequencies are separated into different channels with a contrast ratio of 20 dB. The advantages of this kind of filter are small size and easily tunable operation frequencies. 展开更多
关键词 CCSs PC CS mode High efficiency filtering using two-dimensional photonic crystal coupled cavity structures LINE
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Properties of Defect Modes in Periodic Lossy Multilayer with Negative-Index-Materials
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作者 Alireza Aghajamal Mahmood Barati 《Communications in Theoretical Physics》 SCIE CAS CSCD 2013年第7期80-86,共7页
Employing the characteristic matrix method, this study investigates transmission properties of onedimensional defective lossy photonic crystals composed of negative and positive refractive index layers with one lossle... Employing the characteristic matrix method, this study investigates transmission properties of onedimensional defective lossy photonic crystals composed of negative and positive refractive index layers with one lossless defect layer at the center of the crystal. The results of the study show that as the refractive index and thickness of the defect layer increase, the frequency of the defect mode decreases. In addition, the study shows that the frequency of the defect mode is sensitive to the incidence angle, polarization, and physical properties of the defect layer, but it is insensitive to the small lattice loss factor. The peak of the defect mode is very sensitive to the loss factor, incidence angle, polarization, refractive index, and thickness of the defect layer. This study also shows that the peak and the width of the defect mode are affected by the numbers of the lattice period and the loss factor. The results can lead to designing new types of narrow filter structures and other optical devices. 展开更多
关键词 one-dimensional photonic crystal defect mode loss factor negative index material
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Photonic crystal vertical-cavity surface-emitting laserbased on GaAs material
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作者 XU XingSheng WANG ChunXia SONG Qian DU Wei HU HaiYang ZHAO ZhiMin LU Lin KAN Qiang CHEN HongDa 《Chinese Science Bulletin》 SCIE EI CAS 2007年第18期2473-2476,共4页
A photonic crystal vertical-cavity-surface-emitting laser (PC-VCSEL) with a wavelength of about 850 nm was realized. The direct-current electrically-driven PC-VCSELs with a minimum threshold current of 2 mA and a maxi... A photonic crystal vertical-cavity-surface-emitting laser (PC-VCSEL) with a wavelength of about 850 nm was realized. The direct-current electrically-driven PC-VCSELs with a minimum threshold current of 2 mA and a maximum threshold current of 13.5 mA were obtained. We fabricated a series of PC-VCSEL chips whose lattice constants are in the range from 0.5 to 3 μm with different filling factors, and found that the laser characterization depends on the lattice constant, the filling factor, the size of cavity, etc. 展开更多
关键词 光子晶体 空穴表面发射激光 单模激光 砷化镓
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A novel photonic crystal vertical cavity surface emitting laser based on coherent coupling
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作者 LIU AnJin QU HongWei XING MingXin CHEN Wei ZHOU WenJun ZHENG WanHua 《Chinese Science Bulletin》 SCIE EI CAS 2010年第2期111-113,共3页
We demonstrate a novel oxide confined GaAs-based photonic crystal vertical cavity surface emitting laser (PC-VCSEL) operating at a wavelength of 850 nm based on coherent coupling. A ring-shaped light-emitting aperture... We demonstrate a novel oxide confined GaAs-based photonic crystal vertical cavity surface emitting laser (PC-VCSEL) operating at a wavelength of 850 nm based on coherent coupling. A ring-shaped light-emitting aperture is added to the conventional PC-VCSEL, and coherent coupling is achieved between the central defect aperture and the ring-shaped light-emitting aperture. Measurements show that under the continuous-wave (CW) injected current of 20 mA, a high power of 2 mW is obtained, and the side mode suppression ratio (SMSR) is larger than 20 dB. The average divergence angle is 4.2° at the current level of 20 mA. Compared with the results ever reported, the divergence angle is reduced. 展开更多
关键词 垂直腔表面发射激光器 相干耦合 光子晶体 VCSEL 个人电脑 GaAs 发散角 氧化物
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光子晶体缺陷模的带宽与品质因子研究 被引量:27
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作者 许桂雯 欧阳征标 +5 位作者 安鹤男 孙一翎 曹建章 张登国 阮双琛 李景镇 《光子学报》 EI CAS CSCD 北大核心 2003年第9期1079-1082,共4页
利用光学传输矩阵法研究了结构参量对缺陷态光子晶体的缺陷模带宽和品质因子的影响 研究发现 ,当缺陷介质层厚度h0 的值较小时 ,缺陷模的带宽很小且基本保持不变 ;当h0 较大时 ,缺陷模的带宽随h0 的增加而快速增加 另外发现 ,缺陷模... 利用光学传输矩阵法研究了结构参量对缺陷态光子晶体的缺陷模带宽和品质因子的影响 研究发现 ,当缺陷介质层厚度h0 的值较小时 ,缺陷模的带宽很小且基本保持不变 ;当h0 较大时 ,缺陷模的带宽随h0 的增加而快速增加 另外发现 ,缺陷模的品质因子在某个h0 处取最大值 但是总体上看 ,h0 较小时的品质因子要远大于h0 较大时的品质因子 此外 ,缺陷模的品质因子随光子晶体的周期数增加而急剧增加约 4 .788倍 ,而带宽则随周期数的增加而急剧减少约 4 .788倍 当周期数为 13时就可以获得 10 9以上的品质因子值和小于 10 - 展开更多
关键词 光子晶体 缺陷模 带宽 品质因子 周期数 光子禁带
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一维光子晶体的缺陷模特性研究 被引量:40
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作者 陈宪锋 沈小明 +2 位作者 蒋美萍 倪重文 是度芳 《光子学报》 EI CAS CSCD 北大核心 2005年第12期1876-1880,共5页
利用传输矩阵法研究了缺陷层有吸收的一维光子晶体的带隙结构,在中心波长附近利用泰勒展开式的一级近似得到了缺陷模的高度和半峰全宽的计算公式.研究发现,消光系数、介质周期数和缺陷层厚度对缺陷模高度的影响较大,它们的增大均使缺陷... 利用传输矩阵法研究了缺陷层有吸收的一维光子晶体的带隙结构,在中心波长附近利用泰勒展开式的一级近似得到了缺陷模的高度和半峰全宽的计算公式.研究发现,消光系数、介质周期数和缺陷层厚度对缺陷模高度的影响较大,它们的增大均使缺陷模高度快速下降;而对半峰全宽的影响主要取决于介质的周期数,随周期数的增大缺陷模快速变窄. 展开更多
关键词 光子晶体 缺陷模 传输矩阵 消光系数
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一维光子晶体微谐振腔的调谐特性与品质因子 被引量:12
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作者 王媛媛 何晓东 +2 位作者 胡贵军 全薇 吴冰冰 《光子学报》 EI CAS CSCD 北大核心 2009年第2期285-288,共4页
利用传输矩阵法研究了对称结构和非对称结构一维光子晶体微谐振腔的调谐特性和品质因子.研究发现:当缺陷层光学厚度增加时,缺陷模中心波长也会随着增加即向长波方向移动,微谐振腔的调谐特性与缺陷层两边介质的折射率有关;相比于对称结构... 利用传输矩阵法研究了对称结构和非对称结构一维光子晶体微谐振腔的调谐特性和品质因子.研究发现:当缺陷层光学厚度增加时,缺陷模中心波长也会随着增加即向长波方向移动,微谐振腔的调谐特性与缺陷层两边介质的折射率有关;相比于对称结构,非对称结构能在较小的缺陷层光学厚度变化范围内实现较大波长范围的线性调谐;品质因子随缺陷层厚度的增加先增大后减小,在缺陷模中心波长为λ0时可达最大值;高低折射率介质层的排布对微谐振腔品质因子有影响. 展开更多
关键词 光子晶体 微谐振腔 缺陷模 调谐特性 品质因子
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光子晶体缺陷模的偏振特性研究 被引量:11
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作者 金铱 黄正逸 +2 位作者 陈宪锋 唐丽 是度芳 《激光技术》 CAS CSCD 北大核心 2007年第3期277-280,共4页
为了了解光波在一维光子晶体的传输特性,利用传输矩阵方法进行了数值模拟,并研究了缺陷层厚度对缺陷模偏振特性的影响。结果表明,入射角的变化对光子晶体的禁带及缺陷模影响较大,它们都随入射角的增大向高频(短波)方向移动,s偏振的禁带... 为了了解光波在一维光子晶体的传输特性,利用传输矩阵方法进行了数值模拟,并研究了缺陷层厚度对缺陷模偏振特性的影响。结果表明,入射角的变化对光子晶体的禁带及缺陷模影响较大,它们都随入射角的增大向高频(短波)方向移动,s偏振的禁带宽度逐渐增宽而p偏振的禁带宽度变化不明显,p偏振的缺陷模频移较s偏振的稍大。随着入射角的增大,s偏振的缺陷模越来越细、品质因子逐渐增大,而p偏振的缺陷模变化趋势则刚好相反。 展开更多
关键词 物理光学 光子晶体 传输矩阵 缺陷模 偏振态
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