LiIO$_3$ CRYSTAL FOR GENERATION OF TERAHERTZ RADIATION: MEASUREMENT OF REFRACTIVE INDICES AND CALCULATION OF THE DIFFERENCE FREQUENCY GENERATION SCHEME
Abstract
We determine the dispersion dependences of the ordinary and extraordinary refractive indices of a lithium iodate crystal in the spectral ranges 5–10 and 18–23 THz using spontaneous parametric down-conversion spectroscopy of phonon polaritons. The obtained experimental data and the Sellmeier approximating formulas will be useful for constructing schemes of three-frequency parametric processes involving far-infrared waves, in particular, for schemes of nonlinear optical generation of terahertz waves. As an example, the calculation of frequency–angular tuning curves for terahertz parametric generation with laser pumping at a wavelength of 1.064 μm and additional optical seeding is given.
Fields of Study & Subjects
Terahertz technology and applications
Photorefractive and Nonlinear Optics
Optical and Acousto-Optic Technologies
Publication details
- Journal / source
- Radiophysics and Quantum Electronics
- Volume
- 69
- Issue
- 1
- Pages
- 52–52
- Publication date
- 1 January 2026
- Language
- EN