Simulation and optimization of grating optical coupling of terahertz quantum well photodetector

Zhang Rong; Guo Xu-Guang; Cao Jun-Cheng

doi:10.7498/aps.60.050705

journal article Jan 01, 2011

Simulation and optimization of grating optical coupling of terahertz quantum well photodetector

Acta Physica Sinica Vol. 60 No. 5 pp. 050705 · Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences

View at Publisher Save 10.7498/aps.60.050705

Abstract

The grating optical coupling method is commonly used for detecting the normal incident light with a quantum well photodetector. In this paper, the distribution of electromagnetic field in one-dimensional metal grating terahertz quantum well photodetectors is studied with modal method, and the average light intensity in the active region is obtained. The result shows that, the light intensity in the device can be optimized when the period of the grating is comparable with the wavelength of the terahertz wave in the sample and a proper filling factor is chosen according to the device structure, which will improve the responsivity of the device.

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Published: Jan 01, 2011
Vol/Issue: 60(5)
Pages: 050705

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Cite This Article

Zhang Rong, Guo Xu-Guang, Cao Jun-Cheng (2011). Simulation and optimization of grating optical coupling of terahertz quantum well photodetector. Acta Physica Sinica, 60(5), 050705. https://doi.org/10.7498/aps.60.050705

Simulation and optimization of grating optical coupling of terahertz quantum well photodetector

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