Laser & Optoelectronics Progress, Volume. 57, Issue 1, 011402(2020)
High-Contrast Grating Structure Design for Liquid Crystal Tunable Vertical-Cavity Surface-Emitting Lasers
Figures & Tables(6)
Fig. 1. Structural diagram of Si-SiO2 HCG. (a) Three-dimensional structural diagram; (b) cross-section of the grating filled with liquid crystal
Fig. 2. HCG parameters and wavelength as functions of reflectivity. (a) Thickness of Si ridge in grating; (b) thickness of SiO2 in grating; (c) grating period; (d) duty cycle
Fig. 3. Duty cycle, period, and thickness of Si as functions of reflectivity when local reflectivity is the maximum value
Fig. 4. Reflectivity spectra of HCG with TM and TE polarized incident light. (a) TE polarized light; (b) TM polarized light
Fig. 5. Reflectivity as a function of changes in reflective index of liquid crystal in HCG and wavelength
Table 1. Optimization range of each parameter of HCG
View tableTable 1. Optimization range of each parameter of HCG
Incident light Parameter Optimization range /μm TE Si grating thickness 0.65--0.8 TE Grating period 0.5--0.6 TE Duty cycle 0.45--0.55 TM Si grating thickness 0.35--0.38 TM Grating period 0.48--0.52 TM Duty cycle 0.42--0.52
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Zhou Zheng, Yonggang Zou, Linlin Shi, Junyu Fang, Haizhu Wang, Jie Fan, Chao Cui, Li Xu, Xiaohui Ma. High-Contrast Grating Structure Design for Liquid Crystal Tunable Vertical-Cavity Surface-Emitting Lasers[J]. Laser & Optoelectronics Progress, 2020, 57(1): 011402
Paper Information
Category: Lasers and Laser Optics
Received: Jun. 18, 2019
Accepted: Jul. 3, 2019
Published Online: Jan. 3, 2020
The Author Email: Xu Li (361394566@qq.com)
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