Organic Broadband THz Generators Optimized for Efficient Near-Infrared Optical Pumping.

ABSTRACT: New organic THz generators are designed herein by molecular engineering of the refractive index, phonon mode, and spatial asymmetry. These benzothiazolium crystals simultaneously satisfy the crucial requirements for efficient THz wave generation, including having nonlinear optical chromophores with parallel alignment that provide large optical nonlinearity; good phase matching for enhancing the THz generation efficiency in the near-infrared region; strong intermolecular interactions that provide restraining THz self-absorption; high solubility that promotes good crystal growth ability; and a plate-like crystal morphology with excellent optical quality. Consequently, the as-grown benzothiazolium crystals exhibit excellent characteristics for THz wave generation, particularly at near-infrare

SUBMITTER: Shin MH 

PROVIDER: S-EPMC7578856 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature