Translator Disclaimer
24 February 2017 A sensitive coupling structure for terahertz detectors array
Author Affiliations +
Abstract
In order to effectively improve the coupling efficiency of terahertz (THz) detectors, we design a grating-coupled structure on the high-resistivity silicon substrate for 0.2 THz to 0.35 THz band to enhance the ability of coupling terahertz signals. We simulated the electric field distribution of the grating-coupled structure in surface and inside by using the finite difference time domain (FDTD) method. The electric field in the central area of the silicon surface can be enhanced more than 4 times compared with the non-structure silicon substrate. We also simulated the Fabry-Perot cavity in the frequency range from 0.2 THz to 0.35 THz, and the electric field in the central area of the silicon surface can be improved one time compared with the non-structure silicon substrate. In addition, the electric field distribution on the silicon surface can be changed by adjusting parameters of the grating-coupled structure. When the period of the grating is 560 μm, the width of the gold is 187 μm, and the thickness of the silicon substrate is 720 μm, a 4.7 times electric field could be achieved compared with the non-structure silicon substrate at 0.27 THz and around. So, the simulation result shows that the grating-coupled structure has an obvious advantage compared with the Fabry-Perot cavity at THz coupling efficiency.
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peng Xiao, Xuecou Tu, Chengtao Jiang, Chao Wan, Zhou Jiang, Shimin Zhai, Min Gu, Xiaoqing Jia, Lin Kang, Jian Chen, and Peiheng Wu "A sensitive coupling structure for terahertz detectors array", Proc. SPIE 10103, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications X, 101031R (24 February 2017); https://doi.org/10.1117/12.2251387
PROCEEDINGS
6 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

Waveguide silicon nitride grating coupler
Proceedings of SPIE (December 22 2016)
Terahertz multispectral focal plane imaging
Proceedings of SPIE (October 29 2009)
Microlens array for staring infrared imager
Proceedings of SPIE (October 31 1991)

Back to Top