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Double modulation techniques in Fourier Transform infrared photoluminescence

Doppelmodulationsverfahren in der Infrarot-Photolumineszenz-Fourierspektroskopie
: Fuchs, F.; Lusson, A.; Koidl, P.; Wagner, J.

Cameron, D.G. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
7th International Conference on Fourier Transform Spectroscopy 1989. Proceedings
Bellingham/Wash.: SPIE, 1989 (Proceedings of SPIE 1145)
ISBN: 0-8194-0181-1
pp.323-326 : Abb.,Lit.
International Conference on Fourier Transform Spectroscopy <7, 1989, Fairfax/Va.>
Conference Paper
Fraunhofer IAF ()
Fourier transform; GaAs; infrared spectroscopy; Infrarot-Spektroskopie; local vibrational modes; lokalisierte Schwingungsmode; luminescence; spectroscopy

FT photoluminescence is a powerful tool to study mid infrared emission. However, problems may arise from thermal background radiation. A new phase locked modulation technique is presented and will be compared with existing double modulation (lock-in) techniques. The basic idea in our new technique is to apply a phase sensitive excitation of the luminescence instead of phase sensitive detection to separate the luminescence spectra from dominant thermal background radiation. As examples, luminescence of ZnS:Ni and Hg0.73Cd0.27Te are studied.