Work

Temperature sensor based on a hybrid ITO-silica resonant cavity

Year: 2015

Type: article

Abstract: Integrated optical devices comprised of multiple material systems are able to achieve unique performance characteristics, enabling applications in sensing and in telecommunications. Due to ease of fabrication, the majority of previous work has focused on polymer-dielectric or polymer-semiconductor systems. However, the environmental stability of polymers is limited. In the present work, a hybrid device comprised of an indium tin oxide (ITO) coating on a silicon dioxide toroidal resonant cavity is fabricated. Finite element method simulations of the optical field in the multi-material device are performed, and the optical mode profile is significantly altered by the high index film. The quality factor is also measured and is material loss limited. Additionally, its performance as a temperature sensor is characterized. Due to the high thermo-optic coefficient of ITO and the localization of the optical field in the ITO layer, the hybrid temperature sensor demonstrates a nearly 3-fold improvement in performance over the conventional silica device.

Source: Optics Express

DOI: 10.1364/oe.23.001930

Authors: Abian B. Socorro, Soheil Soltani, Ignacio Del Villar, Jesus M. Corres, Andrea M. Armani

Institutions: Universidad Pública de Navarra (UPNA), Universidad de Navarra, University of Southern California

Language: English

Topic: Photonic and Optical Devices

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funders: Ministerio de Economía y Competitividad, Universidad de Navarra, Universidad Pública de Navarra, National Institutes of Health