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Terahertz Generation by Optical Rectification in Sugar Crystal

Abstract : We report on THz pulse generation through optical rectification of femtosecond laser pulses in sugar crystals. The sugar crystals were grown from an aqueous solution of caster cane sugar bought in a local grocery. Sugar exhibits rather good nonlinear coefficients (d 23 56 pm/V), but the optical-THz conversion efficiency remains quite weak because of the lack of phase-matching, when pumped by a laser beam of 0.8-μm central wavelength. Nevertheless, sugar availability at a low price makes it a relevant material for trial experiments.
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Submitted on : Monday, February 21, 2022 - 4:12:18 PM
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Federico Sanjuan, Gwenaël Gaborit, Jean-Louis Coutaz. Terahertz Generation by Optical Rectification in Sugar Crystal. Journal of Infrared, Millimeter and Terahertz Waves, Springer Verlag, 2021, 42 (5), pp.525-536. ⟨10.1007/s10762-021-00795-6⟩. ⟨hal-03583126⟩



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