Berlin 2008 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 51: Poster IV
HL 51.15: Poster
Donnerstag, 28. Februar 2008, 16:30–19:00, Poster D
Second-Harmonic Generation in Gallium Selenide (GaSe) as Investigated with cw Diode Lasers — •Peter Karich1, Lothar Kador1, Kerim R. Allakhverdiev2,3, Tarik Baykara2, and Eldar Salaev3 — 1Institute of Physics and BIMF, University of Bayreuth, D–95440 Bayreuth, Germany — 2Marmara Research Centre of TÜBITAK, Materials Institute, P. K. 21, TR–41470 Gebze/Koçaeli, Turkey — 3Azerbaijan National Academy of Sciences, Insitute of Physics, 370073 Baku, Azerbaijan
A simple custom-built set-up for investigating optical second-harmonic generation in gallium selenide (GaSe) is presented. The high χ(2) coefficient of the material (86 pm/V) permits the use of small cw diode lasers with output powers in the milliwatt range. The spatial homogeneity of different GaSe crystals is investigated with Maker fringe experiments. Multiple reflections between sample surface and glass substrate and absorption of the second-harmonic wave in the crystal give rise to clearly visible effects in the Maker fringe data [1].
[1] W. N. Herman and L. M. Hayden, J. Opt. Soc. Am. B 12, 416 (1995).