Optical properties and application of GaSe:AgGaSe2 crystal

Shin An Ku, Wei Chen Zhu, Chih-Wei Luo, A. A. Angeluts, M. G. Evdokimov, M. M. Nazarov, A. P. Shkurinov, Y. M. Andreev*, G. V. Lanskii, A. V. Shaiduko, K. A. Kokh, V. A. Svetlichnyi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


The nonlinear optical crystal grown from the melt GaSe:AgGaSe2(10%, mass percent) is identified as acentrosymmetric ε-GaSe:Ag(≤0.04%, mass percent) and is used for phase matched frequency conversion. The silver presence results in 30% increase in microhardness, which allows the crystal to be cut and polished at arbitrary direction. The optical properties from visible to mid-IR and further THz ranges are studied in detail. It demonstrates that the absorption coefficient of GaSe:Ag(≤0.04%, mass percent) crystal is twice that of a pure GeSe, and the CO2 laser Second Harmonic Generation(SHG) efficiency is about 1.7 times that of ZnGeP2 crystal.

Original languageEnglish
Pages (from-to)57-63
Number of pages7
JournalChinese Optics
Issue number1
StatePublished - 1 Feb 2012


  • AgGaSe crystal
  • Mid-infrared
  • Optical property
  • Second Harmonic Generation(SHG)
  • THz range

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