Characterization of the nonlinear THz focus for 2D THz spectroscopy

2024/01/02 by Haw-Wei Lin, Pin-Hsun Hsieh, P. Hsieh +2
Chemistry · Engineering · Physics and Astronomy · #Spectroscopy and Laser Applications #Spectroscopy and Quantum Chemical Studies #Terahertz technology and applications

paper · doi:10.1364/josab.515333

openalex publication_date 2024/01/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29

Abstract

We present a sensitive imaging method capable of the selective characterization of the nonlinear THz beam profile, providing a direct handle to optimize χ (3) light-matter interactions that are critical to two-dimensional (2D) THz spectroscopies. In particular, this method facilitates the development of experimentally challenging 2D THz spectroscopies with multiple THz emitters, which enables direct investigations of fast picosecond dynamics in liquids and solids that are challenging in single-emitter 2D THz spectroscopic setups.

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