290 and 340 nm UV LED arrays for fluorescence detection from single airborne particles
Author(s) -
Kristina Davitt,
YoonKyu Song,
William R. Patterson,
A. V. Nurmikko,
M. Gherasimova,
Jung Han,
YongLe Pan,
Richard K. Chang
Publication year - 2005
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.009548
Subject(s) - photomultiplier , light emitting diode , materials science , optoelectronics , optics , fluorescence , diode , ultraviolet , phosphor , detector , physics
We demonstrate a compact system, incorporating a 32-element linear array of ultraviolet (290 nm and 340 nm) light-emitting diodes (LEDs) and a multi-anode photomultiplier tube, to the in-flight fluorescence detection of aerosolized particles, here containing the biological molecules tryptophan and NADH. This system illustrates substantial advances in the growth and fabrication of new semiconductor UV light emitting devices and an evolution in packaging details for LEDs tailored to the bio-aerosol warning problem. Optical engineering strategies are employed which take advantage of the size and versatility of light-emitting diodes to develop a truly compact fluorescence detector.
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