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Proceedings Paper

An electro-optic controllable polarization rotator based on the GaN/Al0.3Ga0.7N superlattice waveguide
Author(s): Tao Wang; Xun Li
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Paper Abstract

III-N group material (GaN, AlN and their alloys) exhibits a promising application for infrared integrated passive photonic devices due to its unique advantages. We use wurtzite GaN/Al0.3Ga0.7N superlattices in the group material to propose an electro-optic controllable polarization rotator with the periodically left-right alternate top electrodes and a bottom electrode. By an operating voltage of 43.1 V applied on the electrodes, the rotator can realize arbitrary 90º polarization rotation. By an adjustable voltage in the ±4.9 V deviation range, the rotator can also make polarization rotation freely controlled in a full 0º~ 90º range. Due to the periodical top electrode structure of the rotator, polarization rotation is possibly controlled by choosing a different top electrode period number. As a basic function device on III-N group material, the rotator offers a simple way to control polarization in photonic integrated circuits. It can find important applications in a type of polarization-insensitive semiconductor optical amplifiers, polarization control systems, etc.

Paper Details

Date Published: 18 December 2019
PDF: 5 pages
Proc. SPIE 11334, AOPC 2019: Optoelectronic Devices and Integration; and Terahertz Technology and Applications, 113340H (18 December 2019); doi: 10.1117/12.2542556
Show Author Affiliations
Tao Wang, Huazhong Univ. of Science and Technology (China)
Xun Li, Huazhong Univ. of Science and Technology (China)
McMaster Univ. (Canada)

Published in SPIE Proceedings Vol. 11334:
AOPC 2019: Optoelectronic Devices and Integration; and Terahertz Technology and Applications
Zhiping Zhou; Xiao-Cong Yuan; Daoxin Dai, Editor(s)

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