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Journal of Nanophotonics • Open Access

Lateral lattice shift engineered slow light in elliptical photonics crystal waveguides
Author(s): Bo Li; Chong Pei Ho; Fu-Li Hsiao; Chengkuo Lee

Paper Abstract

A photonics crystal (PhC) waveguide that operates in the slow-light regime is reported in this paper. A second line of circular air holes from the PhC waveguide in a triangular lattice is replaced by a line of elliptical air holes. Based on a three-dimensional plane wave expansion, the lateral shift of elliptical air holes is conducted to enhance the slow-light characteristics. A group index of 166 and a delay-bandwidth product of 0.1812 are derived from an optimized PhC using elliptical air holes with a lateral shift of 160 nm according to the simulation results. A Mach–Zehnder interferometer (MZI) is integrated with the above-mentioned PhC waveguide with a 17  μm length in one of its arms. The measured transmission spectrum of the fabricated MZI embedded with a PhC waveguide shows slow-light interference patterns.

Paper Details

Date Published: 3 November 2014
PDF: 9 pages
J. Nanophoton. 8(1) 084090 doi: 10.1117/1.JNP.8.084090
Published in: Journal of Nanophotonics Volume 8, Issue 1
Show Author Affiliations
Bo Li, National Univ. of Singapore (Singapore)
Chong Pei Ho, National Univ. of Singapore (Singapore)
Fu-Li Hsiao, National Changhua Univ. of Education (Taiwan)
Chengkuo Lee, National Univ. of Singapore (Singapore)

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