On-chip, High-sensitivity Temperature Sensors Based on Dye-doped Solid-state Polymer Microring Lasers
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.
Applied Physics Letters
Wan, L., Chandrahalim, H., Chen, C., Chen, Q., Mei, T., Oki, Y., Nishimura, N., Guo, L. J., & Fan, X. (2017). On-chip, high-sensitivity temperature sensors based on dye-doped solid-state polymer microring lasers. Applied Physics Letters, 111(6), 061109. https://doi.org/10.1063/1.4986825
© 2017 Authors. Published by AIP Publishing.
The "Link to Full Text" on this page opens the full article [HTML] with expandable figures, hosted at AIP Publishing. A PDF of the published article is available at the top of that page.
This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in volume 111 of Applied Physics Letters as cited and linked below.
A 12-month publisher embargo was observed for this article.