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Because of the exceptional detailed efficiency plus the crucial application price in laser field, they've got captivated Significantly notice at home and overseas. The progress of crystal progress and laser output of BGSe and BGGSe are summarized, and the longer term advancement is prospected.
0 Abstract Abstract: BaGa4Se7 (BGSe) and BaGa2GeSe6 (BGGSe) crystals are novel infrared nonlinear optical components independently designed by Chinese researchers. Due to outstanding comprehensive efficiency plus the vital software worth in laser field, they may have attracted A lot notice at home and abroad.
We report new experimental final results over the section-matching Homes of the BaGa4Se7 crystal for harmonic generation of the Nd:YAG laser-pumped AgGaS2 optical parametric oscillator (OPO) and also a CO2 laser…
The center spots of all Lorentzian peaks are outlined in the figure. The 2 dash line rectangles clearly show the locations on the phonon hole, which maintains its positions in the opposite Raman spectra of different options.
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To be a promising nonlinear optical crystal in the infrared region, BaGa4Se7 also displays phonon strongly linked polariton dynamics with terahertz waves and superior nonlinear coefficients for terahertz technology as a result of phonon resonances. During this perform, we studied the phonon buildings of BaGa4Se7 crystal, with both equally polarized Raman spectroscopy and theoretical calculations. Theoretical calculations existing the phonon dispersion curves, DOS, and vibration modes. Our Raman method assignments and phonon calculations clearly show consistencies in phonon energies, phonon styles, and vibration Instructions. We also listed nine strongest Raman peaks�?vibration manner shots and Raman tensors.
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An interesting phonon hole separates the modes with nevertheless or vibrating Ba atoms. We also determine the nine strongest Raman peaks�?vibration modes and Raman tensors. Our Raman mode assignments and phonon calculations exhibit consistencies in phonon energies, phonon types, and vibration directions. Higher than know-how provides a whole new situation case in point for phonon gaps, provides a complete image with the phonon constructions of BaGa4Se7, and allows us realize phonon gaps, monoclinic crystals, and its phenomena at infrared and terahertz frequency ranges.
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a Calculated phonon band dispersions together the substantial-symmetry Instructions of Brillouin zone for BaGa4Se7. The x axis may be the phonon momentum in K Room, the y axis displays the phonon energies in units of wavenumbers.
Large effectiveness and higher peak electrical power picosecond mid-infrared optical parametric amplifier determined by BaGa4Se7 crystal.