Terahertz optical properties of LBO crystal upon cooling to liquid nitrogen temperature

N. A. Nikolaev, Yu M. Andreev, N. G. Kononova, A. A. Mamrashev, V. D. Antsygin, K. A. Kokh, A. E. Kokh, V. F. Losev, O. I. Potaturkin

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


The anisotropy of optical properties of nonlinear lithium borate (LBO) crystals in the range of 0.2 - 2 THz is investigated by time-domain THz spectroscopy at room temperature and at T = 81 K. It is shown that the birefringence dramatically decreases upon cooling, as a result of which phase-matching conditions cannot be implemented. At the same time, the absorption coefficients ax and ay are found to decrease significantly with decreasing temperature, due to which the LBO crystal becomes a promising material for generating THz radiation via optical rectification and fabricating periodic structures and optical elements.

Original languageEnglish
Pages (from-to)19-21
Number of pages3
JournalQuantum Electronics
Issue number1
Publication statusPublished - 2018
Externally publishedYes


  • Absorption coefficient
  • LBO
  • Lithium borate crystal
  • Refractive index
  • THz radiation


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