The Experts below are selected from a list of 25845 Experts worldwide ranked by ideXlab platform
Bo Wang - One of the best experts on this subject based on the ideXlab platform.
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Polarization-selective Beam Splitter by a sandwiched grating
Optica Applicata, 2020Co-Authors: Bo Wang, Li Chen, Jinyun ZhouAbstract:We describe a polarization-selective Beam Splitter by a sandwiched grating, which can fulfill the high efficiency element for TE polarization and the two-port output for TM polarization. The modal method and the rigorous coupled-wave analysis (RCWA) are employed together to optimize the polarization-selective Beam Splitter. According to the modal method, the grating duty cycle and period are discussed to analyze the physical mechanism of such a dual-function element. Using RCWA, grating depth and thickness of the covering layer are accurately optimized to design such a polarization-selective Beam Splitter. With the optimized grating duty cycle, period, depth and covering layer thickness, TE polarization can be mainly diffracted in the –1st order and two-port output can be achieved for TM polarization in the 0th and the –1st orders. The polarization-selective Beam Splitter should be a useful element in a variety of applications with advantages of high efficiency, wideband property, and dual functions based on a sandwich grating.
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Two-Layer Dielectric Grating as Two-Port Beam Splitter
IEEE Photonics Technology Letters, 2013Co-Authors: Bo Wang, Li Chen, Jinyun ZhouAbstract:A two-port Beam Splitter is presented to obtain the 50/50 output based on the two-layer grating. The previously reported Beam Splitter grating can work only at the special prescribed incident angle. The deviation of incident angle introduces the effect on the splitting ratio uniformity. The proposed two-layer Beam Splitter grating is aimed to obtain the broad incident angular bandwidth. To optimize the Beam Splitter, a simplified modal method and rigorous coupled-wave analysis are employed to analyze the propagation process and to calculate the efficiency. Based on the optimized grating parameters, the 50/50 output can be obtained with the polarization-independent property. Most importantly, good splitting ratio uniformity can be exhibited within the broad angular bandwidth for both TE and TM polarizations. The polarization-independent property and the broad incident angular bandwidth are significant for practical applications.
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three port Beam Splitter of a binary fused silica grating
Applied Optics, 2008Co-Authors: Jijun Feng, Jiangjun Zheng, Changhe Zhou, Bo Wang, Peng LvAbstract:A deep-etched polarization-independent binary fused-silica phase grating as a three-port Beam Splitter is designed and manufactured. The grating profile is optimized by use of the rigorous coupled-wave analysis around the 785 nm wavelength. The physical explanation of the grating is illustrated by the modal method. Simple analytical expressions of the diffraction efficiencies and modal guidelines for the three-port Beam Splitter grating design are given. Holographic recording technology and inductively coupled plasma etching are used to manufacture the fused-silica grating. Experimental results are in good agreement with the theoretical values. (c) 2008 Optical Society of America.
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modal analysis of deep etched low contrast two port Beam Splitter grating
Optics Communications, 2008Co-Authors: Jijun Feng, Jiangjun Zheng, Changhe Zhou, Bo WangAbstract:Modal analysis of a deep-etched low-contrast two-port Beam Splitter grating under Littrow mounting is presented. The guideline for the design of a subwavelength transmission fused-silica phase grating as high-efficiency grating, polarizing Beam Splitter (PBS), and two-port Beam Splitter, is summarized. As an example, a polarization-independent two-port Beam Splitter grating is designed at wavelength of 1064 nm. We firstly analyzed the physical essence of the grating by the simplified modal method. The guideline for the grating design and the approximate grating parameters are obtained. Then using the rigorous coupled-wave analysis (RCWA) with parameters varying around the approximate ones, optimum grating parameters can be determined. With the design guideline, the time for the rigorous calculation of the grating profile parameters can be reduced significantly.
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wideband two port Beam Splitter of a binary fused silica phase grating
Applied Optics, 2008Co-Authors: Bo Wang, Jijun Feng, Changhe Zhou, Huayi Ru, Jiangjun ZhengAbstract:The usual Beam Splitter of multilayer-coated film with a wideband spectrum is not easy to achieve. We describe the realization of a wideband transmission two-port Beam Splitter based on a binary fused-silica phase grating. To achieve high efficiency and equality in the diffracted 0th and ?1st orders, the grating profile parameters are optimized using rigorous coupled-wave analysis at a wavelength of 1550 nm. Holographic recording and the inductively coupled plasma dry etching technique are used to fabricate the fused-silica Beam Splitter grating. The measured efficiency of (45% × 2) = 90% diffracted into the both orders can be obtained with the fabricated grating under Littrow mounting. The physical mechanism of such a wideband two-port Beam Splitter grating can be well explained by the modal method based on two-Beam interference of the modes excited by the incident wave. With the high damage threshold, low coefficient of thermal expansion, and wideband high efficiency, the presented Beam Splitter etched in fused silica should be a useful optical element for a variety of practical applications.
Jijun Feng - One of the best experts on this subject based on the ideXlab platform.
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Silicon polarizing Beam Splitter based on asymmetric slot waveguide
2016 21st OptoElectronics and Communications Conference (OECC) held jointly with 2016 International Conference on Photonics in Switching (PS), 2016Co-Authors: Jijun Feng, Ryoichi Akimoto, Heping ZengAbstract:Silicon polarizing Beam Splitter is designed and fabricated, without adopting strip-slot mode converters. An asymmetric slot waveguide structure can realize a TM light cross-coupling with a strip waveguide, while little TE light coupling can happen.
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Dual-function Beam Splitter of a subwavelength fused-silica grating.
Applied optics, 2009Co-Authors: Jijun Feng, Jiangjun Zheng, Changhe Zhou, Peng LvAbstract:We present the design and fabrication of a novel dual-function subwavelength fused-silica grating that can be used as a polarization-selective Beam Splitter. For TM polarization, the grating can be used as a two-port Beam Splitter at a wavelength of 1550 nm with a total diffraction efficiency of 98%. For TE polarization, the grating can function as a high-efficiency grating, and the diffraction efficiency of the -1st order is 95% under Littrow mounting. This dual-function grating design is based on a simplified modal method. By using the rigorous coupled-wave analysis, the optimum grating parameters can be determined. Holographic recording technology and inductively coupled plasma etching are used to manufacture the fused-silica grating. Experimental results are in agreement with the theoretical values.
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Polarization independent two-port Beam Splitter grating
2009 Conference on Lasers & Electro Optics & The Pacific Rim Conference on Lasers and Electro-Optics, 2009Co-Authors: Jijun Feng, Jiangjun Zheng, Changhe Zhou, Peng LvAbstract:We designed a subwavelength grating for polarization-independent two-port Beam Splitter. The design is based on the simplified modal method. Holographic recording technology and inductively coupled plasma etching can be used to manufacture the grating.
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three port Beam Splitter of a binary fused silica grating
Applied Optics, 2008Co-Authors: Jijun Feng, Jiangjun Zheng, Changhe Zhou, Bo Wang, Peng LvAbstract:A deep-etched polarization-independent binary fused-silica phase grating as a three-port Beam Splitter is designed and manufactured. The grating profile is optimized by use of the rigorous coupled-wave analysis around the 785 nm wavelength. The physical explanation of the grating is illustrated by the modal method. Simple analytical expressions of the diffraction efficiencies and modal guidelines for the three-port Beam Splitter grating design are given. Holographic recording technology and inductively coupled plasma etching are used to manufacture the fused-silica grating. Experimental results are in good agreement with the theoretical values. (c) 2008 Optical Society of America.
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modal analysis of deep etched low contrast two port Beam Splitter grating
Optics Communications, 2008Co-Authors: Jijun Feng, Jiangjun Zheng, Changhe Zhou, Bo WangAbstract:Modal analysis of a deep-etched low-contrast two-port Beam Splitter grating under Littrow mounting is presented. The guideline for the design of a subwavelength transmission fused-silica phase grating as high-efficiency grating, polarizing Beam Splitter (PBS), and two-port Beam Splitter, is summarized. As an example, a polarization-independent two-port Beam Splitter grating is designed at wavelength of 1064 nm. We firstly analyzed the physical essence of the grating by the simplified modal method. The guideline for the grating design and the approximate grating parameters are obtained. Then using the rigorous coupled-wave analysis (RCWA) with parameters varying around the approximate ones, optimum grating parameters can be determined. With the design guideline, the time for the rigorous calculation of the grating profile parameters can be reduced significantly.
M Pepper - One of the best experts on this subject based on the ideXlab platform.
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coherent spin amplification using a Beam Splitter
Physical Review Letters, 2018Co-Authors: Sanjeev Kumar, K J Thomas, I Farrer, D A Ritchie, Jonathan Griffiths, Geraint Jones, M PepperAbstract:: We report spin amplification using a capacitive Beam Splitter in n-type GaAs where the spin polarization is monitored via a transverse electron focusing measurement. It is shown that partially spin-polarized current injected by the emitter can be precisely controlled, and the spin polarization associated with it can be amplified by the Beam Splitter, such that a considerably high spin polarization of around 50% can be obtained. Additionally, the spin remains coherent as shown by the observation of quantum interference. Our results illustrate that spin-polarization amplification can be achieved in materials without strong spin-orbit interaction.
Peng Lv - One of the best experts on this subject based on the ideXlab platform.
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Dual-function Beam Splitter of a subwavelength fused-silica grating.
Applied optics, 2009Co-Authors: Jijun Feng, Jiangjun Zheng, Changhe Zhou, Peng LvAbstract:We present the design and fabrication of a novel dual-function subwavelength fused-silica grating that can be used as a polarization-selective Beam Splitter. For TM polarization, the grating can be used as a two-port Beam Splitter at a wavelength of 1550 nm with a total diffraction efficiency of 98%. For TE polarization, the grating can function as a high-efficiency grating, and the diffraction efficiency of the -1st order is 95% under Littrow mounting. This dual-function grating design is based on a simplified modal method. By using the rigorous coupled-wave analysis, the optimum grating parameters can be determined. Holographic recording technology and inductively coupled plasma etching are used to manufacture the fused-silica grating. Experimental results are in agreement with the theoretical values.
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Polarization independent two-port Beam Splitter grating
2009 Conference on Lasers & Electro Optics & The Pacific Rim Conference on Lasers and Electro-Optics, 2009Co-Authors: Jijun Feng, Jiangjun Zheng, Changhe Zhou, Peng LvAbstract:We designed a subwavelength grating for polarization-independent two-port Beam Splitter. The design is based on the simplified modal method. Holographic recording technology and inductively coupled plasma etching can be used to manufacture the grating.
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three port Beam Splitter of a binary fused silica grating
Applied Optics, 2008Co-Authors: Jijun Feng, Jiangjun Zheng, Changhe Zhou, Bo Wang, Peng LvAbstract:A deep-etched polarization-independent binary fused-silica phase grating as a three-port Beam Splitter is designed and manufactured. The grating profile is optimized by use of the rigorous coupled-wave analysis around the 785 nm wavelength. The physical explanation of the grating is illustrated by the modal method. Simple analytical expressions of the diffraction efficiencies and modal guidelines for the three-port Beam Splitter grating design are given. Holographic recording technology and inductively coupled plasma etching are used to manufacture the fused-silica grating. Experimental results are in good agreement with the theoretical values. (c) 2008 Optical Society of America.
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Three-port Beam Splitter of a binary fused-silica grating.
Applied optics, 2008Co-Authors: Jijun Feng, Wei Jia, Jiangjun Zheng, Changhe Zhou, Bo Wang, Peng LvAbstract:A deep-etched polarization-independent binary fused-silica phase grating as a three-port Beam Splitter is designed and manufactured. The grating profile is optimized by use of the rigorous coupled-wave analysis around the 785 nm wavelength. The physical explanation of the grating is illustrated by the modal method. Simple analytical expressions of the diffraction efficiencies and modal guidelines for the three-port Beam Splitter grating design are given. Holographic recording technology and inductively coupled plasma etching are used to manufacture the fused-silica grating. Experimental results are in good agreement with the theoretical values.
Changhe Zhou - One of the best experts on this subject based on the ideXlab platform.
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Four-port Beam Splitter of a single-groove grating
Holography Diffractive Optics and Applications VIII, 2018Co-Authors: Changcheng Xiang, Changhe Zhou, Jin WangAbstract:A single-groove grating for four-port TE-polarization Beam splitting under normal incidence at the wavelength of 632.8nm is presented. The total efficiency of the Beam Splitter is over 77% with Beam split uniformity better than 5%. Rigorous coupled-wave analysis (RCWA) and the simulated annealing (SA) algorithm are employed to design this Beam Splitter grating. The tolerance of fabrication errors of the grating is analyzed.
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Dual-function Beam Splitter of a subwavelength fused-silica grating.
Applied optics, 2009Co-Authors: Jijun Feng, Jiangjun Zheng, Changhe Zhou, Peng LvAbstract:We present the design and fabrication of a novel dual-function subwavelength fused-silica grating that can be used as a polarization-selective Beam Splitter. For TM polarization, the grating can be used as a two-port Beam Splitter at a wavelength of 1550 nm with a total diffraction efficiency of 98%. For TE polarization, the grating can function as a high-efficiency grating, and the diffraction efficiency of the -1st order is 95% under Littrow mounting. This dual-function grating design is based on a simplified modal method. By using the rigorous coupled-wave analysis, the optimum grating parameters can be determined. Holographic recording technology and inductively coupled plasma etching are used to manufacture the fused-silica grating. Experimental results are in agreement with the theoretical values.
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Polarization independent two-port Beam Splitter grating
2009 Conference on Lasers & Electro Optics & The Pacific Rim Conference on Lasers and Electro-Optics, 2009Co-Authors: Jijun Feng, Jiangjun Zheng, Changhe Zhou, Peng LvAbstract:We designed a subwavelength grating for polarization-independent two-port Beam Splitter. The design is based on the simplified modal method. Holographic recording technology and inductively coupled plasma etching can be used to manufacture the grating.
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three port Beam Splitter of a binary fused silica grating
Applied Optics, 2008Co-Authors: Jijun Feng, Jiangjun Zheng, Changhe Zhou, Bo Wang, Peng LvAbstract:A deep-etched polarization-independent binary fused-silica phase grating as a three-port Beam Splitter is designed and manufactured. The grating profile is optimized by use of the rigorous coupled-wave analysis around the 785 nm wavelength. The physical explanation of the grating is illustrated by the modal method. Simple analytical expressions of the diffraction efficiencies and modal guidelines for the three-port Beam Splitter grating design are given. Holographic recording technology and inductively coupled plasma etching are used to manufacture the fused-silica grating. Experimental results are in good agreement with the theoretical values. (c) 2008 Optical Society of America.
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modal analysis of deep etched low contrast two port Beam Splitter grating
Optics Communications, 2008Co-Authors: Jijun Feng, Jiangjun Zheng, Changhe Zhou, Bo WangAbstract:Modal analysis of a deep-etched low-contrast two-port Beam Splitter grating under Littrow mounting is presented. The guideline for the design of a subwavelength transmission fused-silica phase grating as high-efficiency grating, polarizing Beam Splitter (PBS), and two-port Beam Splitter, is summarized. As an example, a polarization-independent two-port Beam Splitter grating is designed at wavelength of 1064 nm. We firstly analyzed the physical essence of the grating by the simplified modal method. The guideline for the grating design and the approximate grating parameters are obtained. Then using the rigorous coupled-wave analysis (RCWA) with parameters varying around the approximate ones, optimum grating parameters can be determined. With the design guideline, the time for the rigorous calculation of the grating profile parameters can be reduced significantly.
