Open AccessTHz generation by optical rectification of intense near-infrared pulses in organic crystal BNA
Author(s) -
Franz Roeder,
Mostafa Shalaby,
Burgard Beleites,
F. Ronneberger,
A. Gopal
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.404690
Subject(s) - optical rectification , terahertz radiation , materials science , optics , laser , optoelectronics , infrared , nonlinear optics , refractive index , far infrared laser , radiation , wavelength , physics
Generation of terahertz radiation by optical rectification of intense near-infrared laser pulses in N-benzyl-2-methyl-4-nitroaniline (BNA) is investigated in detail by carrying out a complete characterization of the terahertz radiation. We studied the scaling of THz yield with pump pulse repetition rate and fluence which enabled us to predict the optimal operating conditions for BNA crystals at room temperature for 800 nm pump wavelength. Furthermore, recording the transmitted laser spectrum allowed us to calculate the nonlinear refractive index of BNA at 800 nm.