Abstract-Terahertz Generation by Optical Rectification in Sugar Crystal

 

Federico Sanjuan, Gwenaël Gaborit, Jean-Louis Coutaz,

https://link.springer.com/article/10.1007/s10762-021-00795-6

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 (d23≃56$d_{23}\simeq 56$ 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.