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 (\(d_{23}\simeq 56\) 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.

中文翻译：

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糖晶体中通过光学整流产生太赫兹

我们通过糖晶体中的飞秒激光脉冲的光学整流来报告太赫兹脉冲的产生。糖晶体是从当地杂货店购买的细砂糖水溶液中生长出来的。糖表现出相当好的非线性系数（\（d_ {23} \ simeq 56 \） pm / V），但是当缺少0.8的激光束时，由于缺少相位匹配，光-THz转换效率仍然很弱。 -μm中心波长。然而，低价的糖供应使其成为用于试验的相关材料。