| Инд. авторы: | Antsygin V.D., Mamrashev A.A., Nikolaev N.A. |
| Заглавие: | Terahertz birefringence of potassium niobate crystals |
| Библ. ссылка: | Antsygin V.D., Mamrashev A.A., Nikolaev N.A. Terahertz birefringence of potassium niobate crystals // Results in physics. - 2018. - Vol.8. - P.598-599. - EISSN 2211-3797. |
| Внешние системы: | DOI: 10.1016/j.rinp.2017.12.078; WoS: 000428027700085; |
| Реферат: | eng: We present terahertz optical properties (refractive indices and absorption coefficients) of potassium niobate crystals measured by time-domain spectroscopy in the range of 0.2-2.0 THz. We observe average refractive indices n(x) = 5.25, n(y) = 4.8, n(z) = 5.9 for corresponding optical axes X, Y, Z with the large birefringence of Delta n = n(z) - n(y) = 1.1. We report rising absorption coefficient at higher frequencies (alpha similar to 50 cm(-1) at 1 THz for all three axes) while the dichroism is not pronounced. Somewhat higher absorption compared to the previous results could be attributed to some polydomain structure remaining in the crystal. (C) 2018 The Authors. Published by Elsevier B.V.
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| Ключевые слова: | SPECTROSCOPY; KNBO3; Nonlinear crystal; Potassium niobate; POWER; Absorption; Refractive index; Terahertz spectroscopy; Birefringence; DOMAIN; |
| Издано: | 2018 |
| Физ. характеристика: | с.598-599 |