Abstract
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 language | English |
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Pages (from-to) | 19-21 |
Number of pages | 3 |
Journal | Quantum Electronics |
Volume | 48 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2018 |
Externally published | Yes |
Keywords
- Absorption coefficient
- LBO
- Lithium borate crystal
- Refractive index
- THz radiation