Publication:
Hydrogen and humidity sensing based on WGMs of elastic polymer optical microresonators

Placeholder

Organizational Units

Program

KU Authors

Co-Authors

Advisor

Publication Date

Language

English

Journal Title

Journal ISSN

Volume Title

Abstract

We report hydrogen and humidity sensor employing elastic polymer (SU-8) optical microresonators. The sensing mechanism relies on the optical whispering gallery mode (WGM) resonance shifts in the transmission spectra of these microresonators. WGMs are excited through SU-8 waveguides in which a tunable laser light is coupled from an optical fiber. Relative humidity between 0 and 65% is detected at room temperature. For hydrogen sensing, the microresonators are coated with a thin layer of palladium (Pd) metal layer to increase the sensing performance. Hydrogen gas is detected reversibly between 0.3 and 1.5%. Hydrogen gas concentrations higher than 1.5% result irreversible degradation of the devices because of a phase transition occurring in the Pd layer.

Description

Source:

Progress in Electromagnetics Research Symposium

Publisher:

Electromagnetics Academy

Keywords:

Subject

Physics

Citation

Endorsement

Review

Supplemented By

Referenced By

Copy Rights Note

0

Views

0

Downloads

View PlumX Details