학술논문
Photovariation of grating-assisted coupling of terahertz waves into a silicon waveguide.
Document Type
Article
Source
Subject
*SPECTRUM analysis
*WAVEGUIDES
*SILICON
*OPTICAL diffraction
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Language
ISSN
0021-8979
Abstract
Using terahertz (THz) time-domain spectroscopy, we study the coupling of THz waves into a silicon waveguide by means of a grating coupler. We vary the efficiency of the coupling coefficient for selected frequencies up to 20% in amplitude (40% in intensity) by generating photocarriers in the silicon material through illumination of the waveguide with white light. The experimental data are well fitted using the differential method to model the grating diffraction. © 2003 American Institute of Physics. [ABSTRACT FROM AUTHOR]