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Proceedings Paper

Spectroscopy With Visible And Far-Infrared Lasers
Author(s): Martin Gundersen
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Paper Abstract

A discussion of several spectroscopic techniques using two lasers for semiconductor impurity studies is presented. The frequency of one laser is in or near the visible and the other in the far-infrared (10 to 100 microns). The second infrared laser offers several possibilities for spectroscopy in addition to the usual laser properties of high intensity, monochromaticity, and coherence. For example, an infrared laser frequency can be selected which is resonant with or near a donor, acceptor, or exciton (intrinsic or bound) binding energy in a semiconductor. The infrared laser then provides an intense and very precise probe, the effect of which may be studied in the fluorescence or absorption spectra produced by the visible laser. This might be compared to a temperature dependent fluorescence study, with the difference being that a broad thermal effect is replaced by a sharp photodissociative or optical pumping effect produced by the infrared laser. This has application to learning the role of specific impurities in recombination in devices such as an LED.

Paper Details

Date Published: 30 December 1976
PDF: 3 pages
Proc. SPIE 0082, Unconventional Spectroscopy, (30 December 1976); doi: 10.1117/12.954866
Show Author Affiliations
Martin Gundersen, Texas Tech University (United States)


Published in SPIE Proceedings Vol. 0082:
Unconventional Spectroscopy
J. Morris Weinberg, Editor(s)

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