Parametric conversion of infrared radiation in a GaSe crystal

Abdullaev, G. B.; Allakhverdiev, K. R.; Kulevskiǐ, L. A.; Prokhorov, A M; Salaev, É. Yu.; Savel'ev, A D; Smirnov, V.V.

doi:10.1070/qe1975v005n06abeh011312

Cited by 56 publications

(27 citation statements)

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“…A GaSe crystal was first used for laser frequency conversion in the mid-IR in 1972 9,10 . In subsequent years, GaSe was widely used for inlab mid-IR applications 5 .…”

Section: Introductionmentioning

confidence: 99%

Doped GaSe crystals for laser frequency conversion

Guo

Xie

et al. 2015

Light Sci Appl

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In this review, we introduce the current state of the art of the growth technology of pure, lightly doped, and heavily doped (solid solution) nonlinear gallium selenide (GaSe) crystals that are able to generate broadband emission from the near infrared (IR) (0.8 mm) through the mid-and far-IR (terahertz (THz)) ranges and further into the millimeter wave (5.64 mm) range. For the first time, we show that appropriate doping is an efficient method controlling a range of the physical properties of GaSe crystals that are responsible for frequency conversion efficiency and exploitation parameters. After appropriate doping, uniform crystals grown by a modified technology with heat field rotation possess up to 3 times lower absorption coefficient in the main transparency window and THz range. Moreover, doping provides the following benefits: raises by up to 5 times the optical damage threshold; almost eliminates two-photon absorption; allows for dispersion control in the THz range independent of the mid-IR dispersion; and enables crystal processing in arbitrary directions due to the strengthened lattice. Finally, doped GaSe demonstrated better usefulness for processing compared with GaSe grown by the conventional technology and up to 15 times higher frequency conversion efficiency. INTRODUCTIONThe e-polytype of gallium selenide (hereinafter GaSe) has been known since 1934 1 and promises efficient optical frequency conversion and detection over a large range of wavelengths. The performance potential of GaSe, which belongs to the point group symmetry 6m2, can be attributed to its extreme physical properties. GaSe has a broadband transparency window over the range of 0.62-20 mm for non-polarized light continues at wavelengths o50 mm 2,3 . Other attractive physical properties of GaSe are its prodigious birefringence B 5 0.375 at l 5 10.6 mm and 0.79 at terahertz (THz) range 4 , and very high second-order nonlinear susceptibility d 22 5 54 pm V 21 at 10 mm 5 and 24.3 pm/V in the THz band 6 . Among the mid-infrared (IR) anisotropic nonlinear crystals, GaSe has the second highest optical damage threshold 7,8 and thermal conductivity in the plane of the (0001) A GaSe crystal was first used for laser frequency conversion in the mid-IR in 1972 9,10 . In subsequent years, GaSe was widely used for inlab mid-IR applications 5 . Over the past two decades, GaSe has been among the most promising nonlinear optical crystals for efficient generation of ultrabroadband radiation 0.8-5640 mm (with the

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“…A GaSe crystal was first used for laser frequency conversion in the mid-IR in 1972 9,10 . In subsequent years, GaSe was widely used for inlab mid-IR applications 5 .…”

Section: Introductionmentioning

confidence: 99%

Doped GaSe crystals for laser frequency conversion

Guo

Xie

et al. 2015

Light Sci Appl

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“…Results of investigations were in good agreement with the well-known experimental data. After that, the dispersion properties were determined by the linear optics method for the most important wavelength range 0.63−10.6 μm [3]. The coefficients of the dispersion equations were somewhat modified later with application of results of repeated measurements of the refractive index dispersion n o (λ).…”

Section: Well-known Dispersion Equationsmentioning

confidence: 99%

“…Till now, the crystal dispersion properties have continuously been refined in the process of improving the growth technology and technical means of research as well as of appearance of new crystal applications [3,[7][8][9][10][11][12][13][14][15][16]. Determination of these properties by the conventional linear optics methods is hindered by the complexity of manufacturing of optical elements, including prisms for measuring by the least deviation method and plane-parallel plates for determining n e (λ) by the interference and reflection methods.…”

Section: Introductionmentioning

confidence: 99%

“…The GaSe nonlinear crystal, the material for which was synthesized for the first time in 1934 [1], the crystal structure was investigated in 1952 [2], and the nonlinear optics application was demonstrated in 1972 [3], has a great number of attractive physical properties from the viewpoint of applications in different parametrical frequency converters and achievement of high efficiency. Amazing possibility of overlap of the ultra-wide wavelength range of 2.7-3540 μm by the frequency converted spectrum of only one pump laser in only one crystal has been demonstrated [4].…”

Section: Introductionmentioning

confidence: 99%

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Phase matching for the second harmonic generation in GaSe crystals

et al. 2011

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“…Possessing layered structure, high polarizability, optical homogeneity and naturally mirror-like surfaces, a number of nonlinear optical phenomena such as harmonic generation [4,5], parametric light generation [6,7], electron-hole plasma [8][9][10][11][12] and stimulated emission in the visible and terahertz region [13][14][15][16][17][18][19], etc., have been observed in these crystals.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear optical and quanta-dimensional effects in monoselenide of gallium and indium

Kyazim-zade¹,

Salmanov²,

Huseynov³

et al. 2017

Nanosystems: Phys. Chem. Math.

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Nonlinear light absorption and its time evolution at high optical excitation levels in GaSe and InSe layered crystals have been experimentally investigated. It is shown that the nonlinear absorption observed in InSe in the region of exciton resonance is due to the exciton-exciton interaction. The effect of filling the zones detected in GaSe at high excitation intensities leads to a change in the absorption coefficient and the refractive index. For InSe nanoparticles obtained by the chemical deposition method, a quanta-dimensional effect was observed; the width of the forbidden band was dependent upon the dimensions of the nanoparticles.

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Parametric conversion of infrared radiation in a GaSe crystal

Cited by 56 publications

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Doped GaSe crystals for laser frequency conversion

Doped GaSe crystals for laser frequency conversion

Phase matching for the second harmonic generation in GaSe crystals

Nonlinear optical and quanta-dimensional effects in monoselenide of gallium and indium

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