Carbon-nanotube-on-waveguide thermo-optic tuners

Dash, Aneesh and Mere, Viphretuo and Gangavarapu, PRY and Nambiar, SR and Selvaraja, SK and Naik, AK (2018) Carbon-nanotube-on-waveguide thermo-optic tuners. In: OPTICS LETTERS, 43 (21). pp. 5194-5197.

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Abstract

We demonstrate on-waveguide thermo-optic tuners based on solution-processed metallic carbon nanotubes (CNTs) on silicon-on-insulator (SOI) and silicon nitride (SiN) microring resonators operating around 1550 nm. On SOI microring resonators using planarized wire waveguides, a thermo-optic power efficiency of 29 mW/FSR and a thermal transient of 1.3 mu s are achieved. The heater is shown to be more power-efficient than conventional metal heaters and has lower thermal transient than both metal heaters and graphene-based heaters. On SiN microring resonators using rib waveguides, improvement in power efficiency with an increase in coverage of CNTs is demonstrated, indicating localized heating using the CNTs; this is favorable for low thermal cross-talk. An optimal power efficiency of 142 mW/FSR and a thermal transient of 5.8 mu s are achieved. (C) 2018 Optical Society of America

Item Type:	Journal Article
Publication:	OPTICS LETTERS
Publisher:	OPTICAL SOC AMER
Additional Information:	Copy right for this article belong to OPTICAL SOC AMER
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	20 Nov 2018 17:27
Last Modified:	20 Nov 2018 17:27
URI:	http://eprints.iisc.ac.in/id/eprint/61110

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