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Coherent generation of arbitrary first-order Poincaré sphere beams on an Si chip

Coherent generation of arbitrary first-order Poincaré sphere beams on an Si chip
Coherent generation of arbitrary first-order Poincaré sphere beams on an Si chip
Generalized vector vortex light beams possess spatially variant polarization states, and higher-order Poincaré spheres represent a powerful analytical tool for analyzing these intriguing and complicated optical fields. For the generation of these vortex beams, a range of different methods have been explored, with an increasing emphasis placed on compact, integrated devices. Here, we demonstrate via numerical simulation, for the first time, an on-chip light emitter that allows for the controllable generation of all points on a first-order Poincaré sphere (FOPS). The FOPS beam generator consists of a waveguide-coupled, nanostructured Si microring resonator that converts two guided, coherent light waves into freely propagating output light. By matching their whispering gallery modes with the nanostructures, the fundamental TE (transverse electric) and TM (transverse magnetic) input modes produce radial and azimuthal polarizations, respectively. These two linear polarizations can form a pair of eigenstates for the FOPS. Consequently, tuning the phase contrast and the intensity ratio of these two coherent inputs allows for the generation of an arbitrary point on the FOPS. This result indicates a new way for on-chip vector vortex beam generation, which may be applied for integrated optical tweezers and high-capacity optical communications.
1094-4087
7342-7355
Pi, Hailong
32718fa6-ab51-4d28-b147-ce16a3235ac7
Yu, Wangke
c5688b04-647c-4189-a3b0-ac87aa883bbf
Yan, Jize
786dc090-843b-435d-adbe-1d35e8fc5828
Fang, Xu
96b4b212-496b-4d68-82a4-06df70f94a86
Pi, Hailong
32718fa6-ab51-4d28-b147-ce16a3235ac7
Yu, Wangke
c5688b04-647c-4189-a3b0-ac87aa883bbf
Yan, Jize
786dc090-843b-435d-adbe-1d35e8fc5828
Fang, Xu
96b4b212-496b-4d68-82a4-06df70f94a86

Pi, Hailong, Yu, Wangke, Yan, Jize and Fang, Xu (2022) Coherent generation of arbitrary first-order Poincaré sphere beams on an Si chip. Optics Express, 30 (5), 7342-7355. (doi:10.1364/OE.438695).

Record type: Article

Abstract

Generalized vector vortex light beams possess spatially variant polarization states, and higher-order Poincaré spheres represent a powerful analytical tool for analyzing these intriguing and complicated optical fields. For the generation of these vortex beams, a range of different methods have been explored, with an increasing emphasis placed on compact, integrated devices. Here, we demonstrate via numerical simulation, for the first time, an on-chip light emitter that allows for the controllable generation of all points on a first-order Poincaré sphere (FOPS). The FOPS beam generator consists of a waveguide-coupled, nanostructured Si microring resonator that converts two guided, coherent light waves into freely propagating output light. By matching their whispering gallery modes with the nanostructures, the fundamental TE (transverse electric) and TM (transverse magnetic) input modes produce radial and azimuthal polarizations, respectively. These two linear polarizations can form a pair of eigenstates for the FOPS. Consequently, tuning the phase contrast and the intensity ratio of these two coherent inputs allows for the generation of an arbitrary point on the FOPS. This result indicates a new way for on-chip vector vortex beam generation, which may be applied for integrated optical tweezers and high-capacity optical communications.

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Accepted/In Press date: 8 February 2022
Published date: 18 February 2022

Identifiers

Local EPrints ID: 456416
URI: http://eprints.soton.ac.uk/id/eprint/456416
ISSN: 1094-4087
PURE UUID: 250f880f-880e-47b9-8bee-7f84e20bf415
ORCID for Jize Yan: ORCID iD orcid.org/0000-0002-2886-2847
ORCID for Xu Fang: ORCID iD orcid.org/0000-0003-1735-2654

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Date deposited: 28 Apr 2022 16:36
Last modified: 29 Apr 2022 01:47

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Contributors

Author: Hailong Pi
Author: Wangke Yu
Author: Jize Yan ORCID iD
Author: Xu Fang ORCID iD

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