Inxga1−xse mixed crystals grown from an in flux by the traveling heater method for thz wave generation

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

Research output: Contribution to journalArticlepeer-review

Abstract

The growth rate of crystalline GaSe from solution was increased by using indium as a solvent. The solubility and concentration gradient of Se were measured using differential scanning calorimetry (DSC). The Se solubility and the temperature coefficient of the solubility were respectively 15 times and 2.2 times greater in crystals grown from an In flux with GaSe at saturation compared with the case of Se dissolved in a Ga flux. In this study, we succeeded in growing InxGa1−xSe ingots from an In flux without the need for a seed crystal, and in increasing the growth rate of GaSe from solution. In addition, we used difference frequency generation to generate THz waves (with a frequency of 9.7 THz) in an InxGa1−xSe mixed crystal and investigated the relationship between the output energy of the THz radiation and the interaction length of the excitation light. The conversion efficiency of THz wave (9.7 THz) from the InxGa1−xSe mixed crystal with thickness of 860 μm was 26 times greater than that of GaSe crystal with thickness 100 μm grown from Ga solvent.

Original languageEnglish
Article number065007
Pages (from-to)1-10
Number of pages10
JournalJournal of Physics Communications
Volume4
Issue number6
DOIs
Publication statusPublished - 2020

Keywords

  • Gallium selenide
  • Nonlinear optical crystal
  • Solubility
  • Solution growth
  • Ternary compounds

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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