Abstract

We characterize the terahertz (THz) generation of N-benzyl-2-methyl-4-nitroaniline (BNA), with crystals ranging in thickness from 123 to 700 µm. We compare excitation using 800 nm and 1250 to 1500 nm wavelengths. Pumping BNA with 800 nm wavelengths and longer near-infrared wavelengths results in a broad spectrum, producing out to 6 THz using a 100 fs pump, provided the BNA crystal is thin enough. ${\sim}{{200}}\;\unicode{x00B5}{\rm m}$ or thinner crystals are required to produce a broad spectrum with an 800 nm pump, whereas ${\sim}{{300}}\;\unicode{x00B5}{\rm m}$ thick crystals are optimal for broadband THz generation using the longer wavelengths. We report the favorable THz generation and optical characteristics of our BNA crystals that make them attractive for broadband, high-field THz generation, and we also compare differences in THz properties relative to BNA characteristics reported in other works.

© 2021 Optical Society of America

THz generation by optical rectification of intense near-infrared pulses in organic crystal BNA

F. Roeder, M. Shalaby, B. Beleites, F. Ronneberger, and A. Gopal
Opt. Express 28(24) 36274-36285 (2020)

Milliwatt average power, MHz-repetition rate, broadband THz generation in organic crystal BNA with diamond substrate

Samira Mansourzadeh, Tim Vogel, Mostafa Shalaby, Frank Wulf, and Clara J. Saraceno
Opt. Express 29(24) 38946-38957 (2021)

Enabling high-power, broadband THz generation with 800-nm pump wavelength

Zachary B. Zaccardi, Isaac C. Tangen, Gabriel A. Valdivia-Berroeta, Charles B. Bahr, Karissa C. Kenney, Claire Rader, Matthew J. Lutz, Brittan P. Hunter, David J. Michaelis, and Jeremy A. Johnson
Opt. Express 29(23) 38084-38094 (2021)

Optimized terahertz-wave generation using BNA-DFG

Katsuhiko Miyamoto, Seigo Ohno, Masazumi Fujiwara, Hiroaki Minamide, Hideki Hashimoto, and Hiromasa Ito
Opt. Express 17(17) 14832-14838 (2009)

Efficient terahertz generation in highly nonlinear organic crystal HMB-TMS

Jian Lu, Seung-Heon Lee, Xian Li, Seung-Chul Lee, Jae-Hyun Han, O-Pil Kown, and Keith A. Nelson
Opt. Express 26(23) 30786-30794 (2018)