K4GeP4Se12: A case for phase-change nonlinear optical chalcogenide

J. I. Jang, S. Park, C. M. Harrison, D. J. Clark, C. D. Morris, I. Chung, M. G. Kanatzidis

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


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 μm. Our results imply that K4GeP4Se12 can be utilized for various NLO applications in the mid-infrared spectrum.

Original languageEnglish
Pages (from-to)1316-1318
Number of pages3
JournalOptics Letters
Issue number8
Publication statusPublished - Apr 15 2013

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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