Passive wavelength selective polarization rotator in a hybrid waveguide platform

Dash, RK and Selvaraja, SK (2024) Passive wavelength selective polarization rotator in a hybrid waveguide platform. In: Optics Express, 32 (8). pp. 13035-13047.

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Abstract

Polarization rotation and wavelength filtering are key functionalities used to build complex photonic integrated circuits. Both these functionalities have been demonstrated in various material and device platforms. We propose, for the first time, a fully passive wavelength selective polarization rotation in silicon nitride/amorphous silicon hybrid waveguide. We demonstrate TE0 � TM0 and TM0 � TE0 wavelength selective polarization rotator-cum-filter with a measured 3dB bandwidth of 14.8 nm. Further, we experimentally demonstrate a proof of concept for simultaneous coarse wavelength division multiplexing and polarization rotation for the first time in a passive configuration. We also show the feasibility of bandwidth engineering from 0.59 nm to 81 nm, enabled by the unique flexibility of the proposed hybrid waveguide. © 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

Item Type:	Journal Article
Publication:	Optics Express
Publisher:	Optica Publishing Group (formerly OSA)
Additional Information:	The copyright for this article belongs to authors.
Keywords:	Passive filters; Polarization; Silicon nitride; Waveguide filters, 3 dB bandwidth; 3dB-bandwidth; Coarse wavelength-division-multiplexing; Hybrid waveguides; Photonics Integrated Circuits; Polarization rotation; Polarization rotator; Proof of concept; Wavelength filtering; Wavelength-selective, Bandwidth
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	10 Jul 2024 10:19
Last Modified:	10 Jul 2024 10:19
URI:	http://eprints.iisc.ac.in/id/eprint/84789

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