An electro-optic controllable polarization rotator based on the GaN/Al0.3Ga0.7N superlattice waveguide

Tao Wang; Xun Li

doi:10.1117/12.2542556

18 December 2019 An electro-optic controllable polarization rotator based on the GaN/Al_0.3Ga_0.7N superlattice waveguide

Tao Wang, Xun Li

Author Affiliations +

Proceedings Volume 11334, AOPC 2019: Optoelectronic Devices and Integration; and Terahertz Technology and Applications; 113340H (2019) https://doi.org/10.1117/12.2542556
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China

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/Al_0.3Ga_0.7N 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.

Citation Download Citation

Tao Wang and Xun Li "An electro-optic controllable polarization rotator based on the GaN/Al_0.3Ga_0.7N superlattice waveguide", Proc. SPIE 11334, AOPC 2019: Optoelectronic Devices and Integration; and Terahertz Technology and Applications, 113340H (18 December 2019); https://doi.org/10.1117/12.2542556

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