10.1063/1.4986825">
 

Title

On-chip, High-sensitivity Temperature Sensors Based on Dye-doped Solid-state Polymer Microring Lasers

Document Type

Article

Publication Date

8-2017

Abstract

We developed a chip-scale temperature sensor with a high sensitivity of 228.6 pm/°C based on a rhodamine 6G (R6G)-doped SU-8 whispering-gallery mode microring laser. The optical mode was largely distributed in a polymer core layer with a 30 μm height that provided detection sensitivity, and the chemically robust fused-silica microring resonator host platform guaranteed its versatility for investigating different functional polymer materials with different refractive indices. As a proof of concept, a dye-doped hyperbranched polymer (TZ-001) microring laser-based temperature sensor was simultaneously developed on the same host wafer and characterized using a free-space optics measurement setup. Compared to TZ-001, the SU-8 polymer microring laser had a lower lasing threshold and a better photostability. The R6G-doped SU-8 polymer microring laser demonstrated greater adaptability as a high-performance temperature-sensing element. In addition to the sensitivity, the temperature resolutions for the laser-based sensors were also estimated to be 0.13 °C and 0.35 °C, respectively. The rapid and simple implementation of micrometer-sized temperature sensors that operate in the range of 31 – 43 °C enables their potential application in thermometry.

Comments

© 2017 Authors, published under an exclusive license with American Institute of Physics.

The "Link to Full text" on this page opens the article at the AIP Publishing site. There is a PDF download option on that page.

A 12-month publisher embargo was observed for this article availability.

Supplementary material is provided at the linked article page.

Funding notes: This work was supported by the National Science Foundation (Nos. DBI-1256001 and DBI-1451127).

Source Publication

Applied Physics Letters

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