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Thermally-induced optical modulation in a vanadium dioxide-on-silicon waveguide

Jeyaselvan, V and Pal, A and Kumar, PSA and Kumar Selvaraja, S (2020) Thermally-induced optical modulation in a vanadium dioxide-on-silicon waveguide. In: OSA Continuum, 3 (1). pp. 132-142.

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Official URL: https://doi.org/10.1364/OSAC.382861


In this paper, we report phase-pure vanadium dioxide (VO2) deposition on silicon-on-insulator and demonstrate switching/modulation exploiting the phase-change property. We present electrical and optical properties of VO2 during phase transition. Exploiting the phase change property, optical modulation is achieved by thermally tuning the VO2 phase using a lateral micro-heater beside the waveguide. We achieve an optical modulation extinction of 25 dB and a low insertion loss of 1.4 dB using a ring resonator with a VO2 patch. We also demonstrate the switching performance of a symmetric Mach-Zehnder interferometer and present a detailed discussion on the optimal operating point to achieve maximum modulation, higher speed, and lower insertion loss.

Item Type: Journal Article
Publication: OSA Continuum
Publisher: The Optical Society
Additional Information: The copyright for this article belongs to the Authors.
Keywords: Insertion losses; Light modulation; Optical properties; Optical waveguides; Silicon on insulator technology; Vanadium dioxide, Electrical and optical properties; Low insertion loss; Optimal operating point; Phase change property; Silicon waveguide; Switching performance; Symmetric mach-zehnder; Thermally induced, Optical signal processing
Department/Centre: Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited: 04 Jan 2023 10:20
Last Modified: 04 Jan 2023 10:20
URI: https://eprints.iisc.ac.in/id/eprint/79470

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