The dielectric tensor rotation angle and optical properties of a nonlinear crystal of bismuth triborate in the millimeter-wave range

N. A. Nikolaev; A. A. Mamrashev; V. D. Antsygin; D. M. Ezhov; D. M. Lubenko; V. A. Svetlichnyi; Yu. M. Andreev; V. F. Losev

doi:10.1117/12.2613758

2 December 2021 The dielectric tensor rotation angle and optical properties of a nonlinear crystal of bismuth triborate in the millimeter-wave range

N. A. Nikolaev, A. A. Mamrashev, V. D. Antsygin, D. M. Ezhov, D. M. Lubenko, V. A. Svetlichnyi, Yu. M. Andreev, V. F. Losev

Author Affiliations +

Proceedings Volume 12086, XV International Conference on Pulsed Lasers and Laser Applications; 120861A (2021) https://doi.org/10.1117/12.2613758
Event: XV International Conference on Pulsed Lasers and Laser Applications, 2021, Tomsk, Russian Federation

Abstract

We present the thorough studies of dielectric properties of BiB₃O₆ (BIBO) crystal in the subterahertz range. We observe a large birefringence Δn = n_Z −n_X = 1.5 and the values of absorption coefficients of all three axes to be less than 0.5 cm⁻¹ at the frequency of 0.3 THz. The difference from visible range in angle Φ between the dielectric axis z and crystallophysical axis χ is found to be more than 6°. The simulated phase-matching curves in the xz plane of the crystal show the optimal value of the angle θ to be around 25.5°±1° for an efficient millimeter-wave generation under the pump of 1064 nm laser radiation.

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N. A. Nikolaev, A. A. Mamrashev, V. D. Antsygin, D. M. Ezhov, D. M. Lubenko, V. A. Svetlichnyi, Yu. M. Andreev, and V. F. Losev "The dielectric tensor rotation angle and optical properties of a nonlinear crystal of bismuth triborate in the millimeter-wave range", Proc. SPIE 12086, XV International Conference on Pulsed Lasers and Laser Applications, 120861A (2 December 2021); https://doi.org/10.1117/12.2613758

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