A Polyaniline-Coated Integrated Microfiber Resonator for UV Detection

Author

Kok-Sing Lim ; Yeong-Siang Chiam ; Sook-Wai Phang ; Wu-Yi Chong ; Chang-Hong Pua ; Zulkifli, Ahmad Zarif ; Ganesan, I. ; Harun, Sulaiman Wadi ; Ahmad, Harith

Author_Institution

Photonics Res. Centre, Univ. of Malaya, Kuala Lumpur, Malaysia

Volume

13

Issue

5

fYear

2013

fDate

May-13

Firstpage

2020

Lastpage

2025

Abstract

We present a UV detector based on an integrated microfiber resonator. In fabrication, a thin layer of polyaniline (PAni) is deposited on a ~1-mm-diameter microfiber ring resonator-the sensing region of the detector. Red shift is observed in the output spectrum when PAni is irradiated with a UV light with a peak wavelength at 365 nm. This phenomenon can be due to the high absorbance in the UV region and photothermal effect of PAni. The wavelength shift is linearly proportional to the UV light intensity and the measured sensitivity is 6.61 nm/(W·cm^-2).

Keywords

fibre optic sensors; optical polymers; optical resonators; UV detection; UV detector; UV light intensity; UV region; microfiber ring resonator; photothermal effect; polyaniline-coated integrated microfiber resonator; red shift; sensing region; wavelength 365 nm; wavelength shift; Chemicals; Detectors; Fabrication; Optical resonators; Sensitivity; Temperature sensors; Microfiber; UV; polyaniline; sensors;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2013.2246915

Filename

6461038