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Optical Engineering

Properties of nonlinear optical crystals in the terahertz wavelength region
Author(s): Narsingh B. Singh; Theodore B. Norris; T. Buma; R. N. Singh; M. Gottlieb; D. Suhre; Jack J. Hawkins
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Paper Abstract

High-quality crystals of gallium selenide (GaSe) and thallium arsenic selenide (Tl3AsSe3) were successfully grown. The refractive indices were measured in the subterahertz spectral region using time-domain spectroscopy. GaSe has a refractive index of 3.2 and an absorption coefficient of 1 cm–1, along with an absorption peak at 0.6 THz. Tl3AsSe3 clearly shows birefringence, where the refractive indices are 5.0 and 5.4 along the fast and slow axes, respectively. The absorption coefficient is over 3 cm–1 at 0.3 THz, increasing steadily with frequency.

Paper Details

Date Published: 1 September 2006
PDF: 7 pages
Opt. Eng. 45(9) 094002 doi: 10.1117/1.2349516
Published in: Optical Engineering Volume 45, Issue 9
Show Author Affiliations
Narsingh B. Singh, Northrop Grumman Corp. (United States)
Theodore B. Norris, Univ. of Michigan (United States)
T. Buma, Univ. of Michigan (United States)
R. N. Singh, Univ. of Cincinnati (United States)
M. Gottlieb, Northrop Grumman Corp. (United States)
D. Suhre, Northrop Grumman Corp. (United States)
Jack J. Hawkins, Northrop Grumman Corp. (United States)

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