Generation of THz emission in nonlinear BBO crystal at room temperature

Lubenko, D. M.; Lansky, G. V.; Nikolaev, Nazar; Sandabkin, E. A.; Лосев, В. Ф.; Andreev, Yu. A.

doi:10.1117/12.2554152

Cited by 4 publications

(1 citation statement)

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“…The first works devoted to DFG in the THz range considered semiconductor crystals with large nonlinear coefficients, such as ZnGeP 2 and GaSe, popular for parametric generation in the mid-IR range [17,18]. In recent years, oxygen-containing nonlinear crystals, for example, β-BBO, LBO, BBO, etc., have been considered for THz frequency generation [19][20][21][22]. They have much lower nonlinear coefficients, but, at the same time, possess laser-induced damage thresholds that are several orders of magnitude higher and a much lower absorption coefficient in the main transparency window.…”

Section: Introductionmentioning

confidence: 99%

Temperature-Dependent Optical Properties of Bismuth Triborate Crystal in the Terahertz Range: Simulation of Terahertz Generation by Collinear Three-Wave Mixing in the Main Crystal Planes

Ezhov,

Nikolaev,

Antsygin

et al. 2023

Photonics

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Terahertz (THz) frequency generation via nonlinear optical techniques is of particular interest due to the immense potential of this type of radiation in various scientific fields, ranging from medicine to telecommunications. Selecting suitable nonlinear media for laser frequency down-conversion presents a challenging task. Considering an approach that uses nonlinear crystals with high radiation resistance, pumped by intense laser pulses near their damage threshold, we suggest the crystal of bismuth triborate (BiB3O6, BIBO). Compared to other borate-class crystals, BIBO exhibits relatively high coefficients of quadratic susceptibility. In this paper, we have studied the optical properties of BIBO samples in a wide spectral range from 0.1 to 2.1 THz at temperatures of 473, 383, 295, and 77 K using Terahertz Time-Domain Spectroscopy (THz-TDS). Furthermore, we simulated collinear three-wave interactions with nonzero efficiency for difference frequency generation (DFG) in the THz range. For the pump wavelengths of about 800 nm, we determined phase-matching (PM) conditions and compared the generation efficiency for different crystal cuts. The potential of utilizing BIBO crystal for terahertz frequency generation is discussed.

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Section: Introductionmentioning

confidence: 99%

Temperature-Dependent Optical Properties of Bismuth Triborate Crystal in the Terahertz Range: Simulation of Terahertz Generation by Collinear Three-Wave Mixing in the Main Crystal Planes

Ezhov,

Nikolaev,

Antsygin

et al. 2023

Photonics

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Efficient second-harmonic and terahertz generation from single BiB₃O₆crystal using nanosecond and femtosecond lasers

et al. 2021

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The paper reports the efficient UV and terahertz generation from a 1.29 mm thick and Type I, θ = 28.9 ∘ cut B i B 3 O 6 (bismuth triborate, BIBO) crystal using femtosecond and nanoseconds laser pulses. We have employed 800 nm wavelength pulses of 50 and 140 fs obtained from a Ti:sapphire laser amplifier and oscillators at 1 kHz and 80 MHz repetition rates, respectively. The conversion efficiency of second-harmonic generation (SHG) was ∼ 50 % while that obtained for terahertz (THz) generations was of the order of 1.85 × 10 − 5 % . In addition, LDS-698 dye laser radiation tunable between 650–700 nm was also used as a source for SHG between the 325–350 nm range. The dye laser was pumped by SHG (532 nm) radiation from an electro-optically Q -switched Nd:YAG laser having a pulse repetition rate of 10 Hz and a pulse width of 10 ns. A conversion efficiency of 4.01% was obtained for generation of UV at 343.5 nm. Finally, we have measured the transmission, refractive index, absorbance, and conductivity properties of BIBO crystal in the THz domain. We also ascertained the coherence length, relative permittivity and reflectivity of the crystal.

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Linear and nonlinear optical characterization of tellurium dioxide (α-TeO₂) for generation of terahertz radiation using time-domain spectroscopy

Ghorui

Chaudhary

2023

Appl. Opt.

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This paper reports the linear and nonlinear optical characterization of α−TeO2 crystal in the optical and terahertz domains for efficient terahertz (THz) generation using a difference frequency mixing technique. We have ascertained the optical properties such as refractive index, absorption coefficients, real and imaginary dielectric constants, and coherence length l c =280mm at 1.77 THz range using an indigenously developed THz spectrometer. The value of refractive index was ascertained from temporal and spectral THz profiles of the crystal and employed for calculating the Type I phase-matching angle, i.e., θ=21.15∘ for the generation of tunable radiation between the 0.1 and 1.9 THz range. The figure of merits in the optical and THz domains lie between the 0.02–0.015 range. The effective bandwidth of the crystal lies between the 0.1 and 3.0 THz range.

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Generation of THz emission in nonlinear BBO crystal at room temperature

Cited by 4 publications

References 0 publications

Temperature-Dependent Optical Properties of Bismuth Triborate Crystal in the Terahertz Range: Simulation of Terahertz Generation by Collinear Three-Wave Mixing in the Main Crystal Planes

Temperature-Dependent Optical Properties of Bismuth Triborate Crystal in the Terahertz Range: Simulation of Terahertz Generation by Collinear Three-Wave Mixing in the Main Crystal Planes

Efficient second-harmonic and terahertz generation from single BiB₃O₆crystal using nanosecond and femtosecond lasers

Linear and nonlinear optical characterization of tellurium dioxide (α-TeO₂) for generation of terahertz radiation using time-domain spectroscopy

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Generation of THz emission in nonlinear BBO crystal at room temperature

Cited by 4 publications

References 0 publications

Temperature-Dependent Optical Properties of Bismuth Triborate Crystal in the Terahertz Range: Simulation of Terahertz Generation by Collinear Three-Wave Mixing in the Main Crystal Planes

Temperature-Dependent Optical Properties of Bismuth Triborate Crystal in the Terahertz Range: Simulation of Terahertz Generation by Collinear Three-Wave Mixing in the Main Crystal Planes

Efficient second-harmonic and terahertz generation from single BiB3O6crystal using nanosecond and femtosecond lasers

Linear and nonlinear optical characterization of tellurium dioxide (α-TeO2) for generation of terahertz radiation using time-domain spectroscopy

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Resources

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Efficient second-harmonic and terahertz generation from single BiB₃O₆crystal using nanosecond and femtosecond lasers

Linear and nonlinear optical characterization of tellurium dioxide (α-TeO₂) for generation of terahertz radiation using time-domain spectroscopy