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Proceedings Paper

Suspended subwavelength grating waveguides on SOI for ultra-broadband operation
Author(s): Ting Li; Peiji Zhou; Yi Zou
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Paper Abstract

In this paper, we provide a new type of subwavelength grating waveguides (SWGs) with a guiding mechanism from 1.5μm to 6μm on a silicon-on-insulator (SOI) platform. Two different SWGs with the same period but different height, corresponds to different effective subwavelength refractive indices, are designed and served as the core and cladding respectively. The biggest hindrance for transmission bandwidth, the buried oxide, is then removed to build up a suspended SWGs, contributing to bandwidth enlargement. In the meantime, the results also show light-matter interaction enhancement that ~34% propagating energy locates in the air can fully interact with testing analytes, leading to higher sensitivity. The broadband and high light-matter integral signatures would address the demands for ideal absorption spectroscopy based lab-on-chip.

Paper Details

Date Published: 26 February 2020
PDF: 7 pages
Proc. SPIE 11285, Silicon Photonics XV, 112850P (26 February 2020); doi: 10.1117/12.2546352
Show Author Affiliations
Ting Li, ShanghaiTech Univ. (China)
Shanghai Institute of Microsystem and Information Technology (China)
Univ. of Chinese Academy of Sciences (China)
Peiji Zhou, ShanghaiTech Univ. (China)
Yi Zou, ShanghaiTech Univ. (China)

Published in SPIE Proceedings Vol. 11285:
Silicon Photonics XV
Graham T. Reed; Andrew P. Knights, Editor(s)

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