Paper
30 December 1976 Spectroscopy With Visible And Far-Infrared Lasers
Martin Gundersen
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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.
© (1976) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Martin Gundersen "Spectroscopy With Visible And Far-Infrared Lasers", Proc. SPIE 0082, Unconventional Spectroscopy, (30 December 1976); https://doi.org/10.1117/12.954866
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KEYWORDS
Infrared radiation

Luminescence

Visible radiation

Absorption

Excitons

Thermography

Infrared lasers

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