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Applied Spectroscopy

Applied Spectroscopy

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  • Vol. 54, Iss. 1 — Jan. 1, 2000
  • pp: 106–109

Micro- and Sub-nanosecond Lifetime Measurements Using a UV Light-Emitting Diode

Henryk Szmacinski and Qing Chang

Applied Spectroscopy, Vol. 54, Issue 1, pp. 106-109 (2000)


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Abstract

The authors describe the use of an ultraviolet light-emitting diode (UV LED), Nichia NSHU590E, as a 373 nm excitation light source for fluorescence lifetime measurements. A frequency-domain technique has been chosen to demonstrate that the UV LED can be efficiently intensity modulated by driving the radio-frequency signal over a range of modulation frequencies from 10 kHz up to 330 MHz. Time-resolved measurements have been performed by using a fluorophore with a very long lifetime of 10.2 mu s and fluorophore with a very short lifetime of 0.15 ns. Application of LEDs for lifetime-based chemical sensing is discussed.

Citation
Henryk Szmacinski and Qing Chang, "Micro- and Sub-nanosecond Lifetime Measurements Using a UV Light-Emitting Diode," Appl. Spectrosc. 54, 106-109 (2000)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-54-1-106

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