High-contrast grating MEMS optical phase-shifters for two-dimensional free-space beam steering

2014 ◽  
Author(s):  
Mischa Megens ◽  
Byung-Wook Yoo ◽  
Trevor Chan ◽  
Weijian Yang ◽  
Tianbo Sun ◽  
...  
Keyword(s):  
Free Space ◽  
Beam Steering ◽  
Phase Shifters ◽  
Two Dimensional ◽  
High Contrast ◽  
Optical Phase ◽  
High Contrast Grating

scholarly journals Grating Lobe-Free Beam Steering through Optical Phase Array Using Phase-Compensated Two Index-Mismatched Silicon Wires-Based Emitters

2020 ◽  
Vol 10 (4) ◽  
pp. 1225
Author(s):  
Rong-An Zhang ◽  
Ting-Sheng Lin ◽  
Wai-Ting Liu ◽  
Shih-Hsiang Hsu ◽  
Che-Chang Chang
Keyword(s):  
Phase Shifter ◽  
Beam Steering ◽  
Thermal Control ◽  
Phase Shifters ◽  
Phase Array ◽  
Optical Phase ◽  
Grating Lobe ◽  
Half Wavelength ◽  
Beam Formation ◽  
Free Beam

The beam formation can be treated as the diffraction pattern. A 1-D light detection and ranging beam steering could be derived through a phase shifter array using Rayleigh–Sommerfeld Diffraction, which is then utilized to demonstrate grating lobe-free beam steering from the optical phase array emitter with half-wavelength pitches. The half-wavelength pitch cannot demonstrate beam formation without any evanescent coupling blocking between emitters. Here, two index-mismatched silicon wires in the emitter array are proposed by the optical phase compensation through waveguide width adjustment, to avoid the complex and addressable thermal control on the phase shifters. Moreover, the same output optical waveguide mode needs to be further considered to demonstrate the grating lobe-free beam steering. In order to get the adiabatic connection between two different pitches between the phase shifter and emitter, an optical path equalization will also be applied.

Optical phase shifting based on high contrast grating waveguide

2012 ◽  
Author(s):  
Yunjie Li ◽  
Tianbo Sun ◽  
Te Chen ◽  
Hongbin Jiang ◽  
Weiwei Hu ◽  
...  
Keyword(s):  
Phase Shifting ◽  
High Contrast ◽  
Optical Phase ◽  
High Contrast Grating

High-transmittivity non-periodic sub-wavelength high-contrast grating with large-angle beam-steering ability

2014 ◽  
Vol 12 (12) ◽  
pp. 120501-120504 ◽  
Author(s):  
Changlian Ma Changlian Ma ◽  
Yongqing Huang Yongqing Huang ◽  
Xiaofeng Duan Xiaofeng Duan ◽  
Xiaomin Ren Xiaomin Ren
Keyword(s):  
Beam Steering ◽  
Large Angle ◽  
High Contrast ◽  
High Contrast Grating ◽  
Sub Wavelength

Optical phased array using high-contrast grating all-pass filters for fast beam steering

2013 ◽  
Author(s):  
Weijian Yang ◽  
Tianbo Sun ◽  
Yi Rao ◽  
Trevor Chan ◽  
Mischa Megens ◽  
...  
Keyword(s):  
Phased Array ◽  
Beam Steering ◽  
High Contrast ◽  
High Contrast Grating ◽  
Optical Phased Array

scholarly journals Theory and design of two-dimensional high-contrast-grating phased arrays

2015 ◽  
Vol 23 (19) ◽  
pp. 24508 ◽  
Author(s):  
Pengfei Qiao ◽  
Li Zhu ◽  
Weng Cho Chew ◽  
Connie J. Chang-Hasnain
Keyword(s):  
Phased Arrays ◽  
Two Dimensional ◽  
High Contrast ◽  
High Contrast Grating

scholarly journals Two-dimensional free-space beam steering with an optical phased array on silicon-on-insulator

2011 ◽  
Vol 19 (22) ◽  
pp. 21595 ◽  
Author(s):  
J. K. Doylend ◽  
M. J. R. Heck ◽  
J. T. Bovington ◽  
J. D. Peters ◽  
L. A. Coldren ◽  
...  
Keyword(s):  
Free Space ◽  
Phased Array ◽  
Beam Steering ◽  
Silicon On Insulator ◽  
Two Dimensional ◽  
Optical Phased Array

Ultra-Low Loss, Chip-Based Hollow-Core Waveguide Using High-Contrast Grating

2011 ◽  
Author(s):  
Constance Chang-Hasnain ◽  
Ming Wu ◽  
Eli Yablonovitch
Keyword(s):  
High Contrast ◽  
Hollow Core ◽  
Low Loss ◽  
High Contrast Grating
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