Polarization-sensitive terahertz time-domain spectroscopy system without mechanical moving parts

Mayuri Nakagawa, Makoto Okano, Shinichi Watanabe

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


We report on the measurement of terahertz electric-field vector waveforms by using a system that contains no mechanical moving parts. It is known that two phase-locked femtosecond lasers with different repetition rates can be used to perform time-domain spectroscopy without using a mechanical delay stage. Furthermore, an electro-optic modulator can be used to perform polarization measurements without rotating any polarizers or waveplates. We experimentally demonstrate the combination of these two methods and explain the analysis of data obtained by such a system. Such a system provides a robust platform that can promote the usage of polarization-sensitive terahertz time-domain spectroscopy in basic science and practical applications. For the experimental demonstration, we alter the polarization of a terahertz wave with a polarizer.

Original languageEnglish
Pages (from-to)29421-29434
Number of pages14
JournalOptics Express
Issue number16
Publication statusPublished - 2022 Aug 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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