Abstract
A novel long-wave infrared absorption structure containing conducting thin film of TiNx and gold is proposed and simulated with FDTD method. This new structure has shown peak absorbance over 93% and more than 80% average absorbance at 8~12 μm theoretically. Nano-grain vanadium oxide (VOx) uncooled 2×64 linear infrared microbolometers with this new infrared absorption structure have been successfully fabricated. The normalized detectivity of the sensing element at peak wavelength is measured to be about 6 × 108 cmHz1/2 W-1, which is feasible to practical imaging application.
Keywords
Vanadium oxide, Microbolometer, Infrared absorbtion.
Citation
JIANJUN LAI, BING WANG, ERJING ZHAO, XIAOMING WAN, SIHAI CHEN, Vanadium oxide linear array infrared microbolometer with a novel infrared absorption structure, Optoelectronics and Advanced Materials - Rapid Communications, 4, 10, October 2010, pp.1481-1484 (2010).
Submitted at: Aug. 28, 2010
Accepted at: Oct. 14, 2010