Photoresponse of a miniaturized metal film bolometer to ultrashort mid- and far-infrared laser pulses
This report investigates a photoresponse induced in a novel, miniaturised low-noise metal resistor film bolometer when irradiated by ultrashort laser pulses (duration 100 ps to 200 ns) with wavelengths covering the mid- and far-infrared spectral ranges. Successful operation at room temperature was achieved and almost constant detectivity was found over the whole frequency range investigated (15 - 1100/cm). The minimum detectable laser pulse energy was determined to be about 0.6 micro-J (with an electronic bandwidth of 1 kHz). This high detectivity and the miniaturised dimensions afford the possibility of building detector arrays applicable in mid- and far-infrared spectroscopy.
Bibliographic Reference: Article: Infrared Physics, Vol. 34 (1993) No. 5, pp. 481-486
Record Number: 199411046 / Last updated on: 1994-11-28
Original language: en
Available languages: en