K4GeP4Se12: a case for phase-change nonlinear optical chalcogenide

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We report on broadband nonlinear optical (NLO) responses from a phase-change chalcogenide compound K4GeP4Se12. Its glassy phase exhibits unusual second-harmonic generation (SHG) due to the preservation of local crystallographic order. The SHG efficiency of the glassy form can be boosted by more than 2 orders of magnitude by simple heat treatment. Strong SHG and third-harmonic generation from both glassy and crystalline compounds were characterized over a wide wavelength range of 1.2-4.0 mu m. Our results imply that K4GeP4Se12 can be utilized for various NLO applications in the mid-infrared spectrum. (C) 2013 Optical Society of America
Publisher
OPTICAL SOC AMER
Issue Date
2013-04
Language
English
Article Type
Article
Citation

OPTICS LETTERS, v.38, no.8, pp.1316 - 1318

ISSN
0146-9592
DOI
10.1364/OL.38.001316
URI
http://hdl.handle.net/10203/191129
Appears in Collection
NT-Journal Papers(저널논문)
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