Title :
UV-sensitive photofunctional device using evanescent field absorption between SU-8 polymer optical waveguide and photochromic dye
Author :
Jang, Su-Won ; Son, Se-Jun ; Kim, Do-Eok ; Kwon, Dae-Hyuk ; Kim, Sung-Hoon ; Lee, Young-Hyun ; Kang, Shin-Won
Author_Institution :
Dept. of Electron. & Inf. Eng., Kyungil Univ., Gyeongsang Buk Do, South Korea
Abstract :
We presented an ultraviolet (UV)-sensitive photofunctional device using a principle of evanescent field coupling occurring between SU-8 waveguide and photochromic dye (spirooxazine). The feasibility as a UV sensor was evaluated. When the 5-mm sensing area was irradiated with UV for 3 s, the absorption and the output intensity of the UV sensor was 0.0396 ∼ 0.114 absorbance/mW and 1 ∼ 10 mW, respectively. The UV sensor had linearity by variation of sensing area. The sensitivity of the proposed sensor was higher than the spectrophotometers method and optical fiber sensors.
Keywords :
dyes; integrated optics; optical polymers; optical waveguides; ultraviolet detectors; ultraviolet radiation effects; ultraviolet spectra; visible spectra; 1 to 10 mW; 3 s; 5 mm; SU-8 waveguide; UV irradiation; UV sensor; UV-sensitive device; evanescent field absorption; evanescent field coupling; optical waveguide; photochromic dye; photofunctional device; polymer waveguide; spirooxazine; Electromagnetic wave absorption; Optical devices; Optical polymers; Optical refraction; Optical sensors; Optical surface waves; Optical variables control; Optical waveguides; Photochromism; Semiconductor waveguides; Photochromic dye (spir-ooxazine); SU-8; polymer waveguide; ultraviolet (UV) sensor;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.860394
