Terahertz wave generation via difference frequency generation using 2D InxGa1−xSe crystal grown from indium flux

Yohei Sato, Chao Tang, Katsuya Watanabe, Junya Ohsaki, Takuya Yamamoto, Nobuki Tezuka, Tadao Tanabe, Yutaka Oyama

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


We demonstrate the generation of THz waves (frequency 9.7 THz) using difference frequency generation in an InxGa1−xSe mixed crystal grown from In flux. The amount of indium and the lattice constant of the crystal were evaluated using electron micro probe analysis and X-ray diffraction, respectively. We believe that the Ga sites were substituted by In atoms in the InxGa1−xSe crystal because the In content, estimated according to the Vegard’s law, was similar to that measured by EPMA. The maximum power of the generated THz wave was 39 pJ and the conversion efficiency was 1.7×10−5 J−1. This conversion efficiency was 28 times larger than that reported for undoped GaSe crystal.

Original languageEnglish
Pages (from-to)472-477
Number of pages6
JournalOptics Express
Issue number1
Publication statusPublished - 2020
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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