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Optical Engineering

Optical performance of long-range air-gaps assisted subwavelength waveguides
Author(s): Yao Liang; Hanwen Wu; Wen Zhou; Xuguang Huang
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Paper Abstract

A long-range air-gaps assisted subwavelength waveguide is proposed and demonstrated. The configuration can be interpreted as a combination of a silicon waveguide and a metal–dielectric–metal (MDM) waveguide. Unlike the conventional MDM waveguide, the proposed waveguide is polarization insensitive because long propagation lengths can be achieved by both the transverse electric (TE) and transverse magnetic (TM) polarizations. The propagation length of this waveguide can even be up to decimeters. Moreover, this design is very compact with only a 1.05  μm center-to-center separation between two adjacent waveguides, while the waveguide isolation is <58  dB. Also, it is capable of guiding light effectively (<97% transmittance) through a 90 deg bend with a small bending radius (1  μm). These unique features make the proposed waveguide a promising candidate for the future large-scale photonic integrated circuits.

Paper Details

Date Published: 8 August 2014
PDF: 7 pages
Opt. Eng. 53(8) 087101 doi: 10.1117/1.OE.53.8.087101
Published in: Optical Engineering Volume 53, Issue 8
Show Author Affiliations
Yao Liang, South China Normal Univ. (China)
Hanwen Wu, South China Normal Univ. (China)
Wen Zhou, South China Normal Univ. (China)
Xuguang Huang, South China Normal Univ. (China)

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