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Beam Splitter

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Bo Wang – 1st expert on this subject based on the ideXlab platform

  • Polarization-selective Beam Splitter by a sandwiched grating
    Optica Applicata, 2020
    Co-Authors: Bo Wang, Li Chen, Jinyun Zhou

    Abstract:

    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.

  • Two-Layer Dielectric Grating as Two-Port Beam Splitter
    IEEE Photonics Technology Letters, 2013
    Co-Authors: Bo Wang, Li Chen, Jinyun Zhou

    Abstract:

    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.

  • three port Beam Splitter of a binary fused silica grating
    Applied Optics, 2008
    Co-Authors: Jijun Feng, Changhe Zhou, Jiangjun Zheng, Bo Wang, Peng Lv

    Abstract:

    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.

Jijun Feng – 2nd expert on this subject based on the ideXlab platform

  • 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), 2016
    Co-Authors: Jijun Feng, Ryoichi Akimoto, Heping Zeng

    Abstract:

    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.

  • Dual-function Beam Splitter of a subwavelength fused-silica grating.
    Applied optics, 2009
    Co-Authors: Jijun Feng, Changhe Zhou, Jiangjun Zheng, Peng Lv

    Abstract:

    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.

  • Polarization independent two-port Beam Splitter grating
    2009 Conference on Lasers & Electro Optics & The Pacific Rim Conference on Lasers and Electro-Optics, 2009
    Co-Authors: Jijun Feng, Changhe Zhou, Jiangjun Zheng, Peng Lv

    Abstract:

    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.

M Pepper – 3rd expert on this subject based on the ideXlab platform

  • coherent spin amplification using a Beam Splitter
    Physical Review Letters, 2018
    Co-Authors: Sanjeev Kumar, M Pepper, K J Thomas, I Farrer, D A Ritchie, Jonathan Griffiths, Geraint Jones

    Abstract:

    : 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.