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

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Supplementary Material (1)

NameDescription
Supplement 1       Information on detection bandwidth, THz spectra comparison, Lorentz oscillator fit results, and x-ray structure details.

Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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