Title :
9-Channel photonic crystal mosaic filters for near infra-red spectroscopic imaging
Author :
Kurniatan, D. ; Ohtera, Y. ; Yamada, H.
Author_Institution :
Grad. Sch. of Eng., Tohoku Univ., Sendai, Japan
Abstract :
Multi-channel wavelength filters utilizing multilayer-type photonic crystals (PhCs) for the near infrared (NIR) wavelength range are designed and fabricated. The PhC filters (PhCFs) were made by the autocloning method and consisted of a wavy multilayer stack of Si/SiO2. Each PhCF is designed to function as a long-wave passing type edge filter with a cut-off wavelength at NIR (1200-1450 nm) wavelengths. The PhCFs are arranged in a mosaic pattern of the same dimensions as an InGaAs image sensor. We experimentally demonstrated the simultaneous acquisition of multi-wavelength images, and non-destructive estimation of a concentration of a specific liquid mixture.
Keywords :
gallium arsenide; indium compounds; infrared imaging; infrared spectroscopy; optical design techniques; optical fabrication; optical filters; photonic crystals; InGaAs; autocloning method; image sensor; multi-channel wavelength filters; multi-wavelength images; multilayer-type photonic crystals; near infrared spectroscopic imaging; photonic crystal mosaic filters; wavelength 1200 nm to 1450 nm; wavy multilayer stack; Estimation; Ethanol; Imaging; Optical filters; Photonic crystals; Pixel; Silicon;
Conference_Titel :
OptoElectronics and Communications Conference (OECC), 2010 15th
Conference_Location :
Sapporo
Print_ISBN :
978-1-4244-6785-3
