FIELD: physics.
SUBSTANCE: invention can be used when making parametric frequency converters of laser radiation in the middle infrared and terhertz spectral range. The normal refraction index of a nonlinear GaSe crystal is changed by doping with chemical element Al with a small size compared to the chemical element Ga in concentration of 0.005-0.05 wt %.
EFFECT: increasing refraction index for normal polarisation waves in GaSe crystals with minimal changes in the refraction index for unusual polarisation waves.
1 tbl
| Title | Year | Author | Number |
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| METHOD OF DETERMINING REACTIVE INDEX OF FERROELECTRIC CRYSTAL | 0 |
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SU1318858A1 |
