Generation of high-quality terahertz OAM mode based on soft-aperture difference frequency generation

Katsuhiko Miyamoto, Kazuki Sano, Takahiro Miyakawa, Hiromasa Niinomi, Kohei Toyoda, Adam Vallés, Takashige Omatsu

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We demonstrate the generation of high-quality tunable terahertz (THz) vortices in an eigenmode by employing soft-aperture difference frequency generation of vortex and Gaussian modes. The generated THz vortex output exhibits a high-quality orbital angular momentum (OAM) mode with a topological charge of `THz = ±1 in a frequency range of 2-6 THz. The maximum average power of the THz vortex output obtained was ∼3.3 µW at 4 THz.

Original languageEnglish
Pages (from-to)31840-31849
Number of pages10
JournalOptics Express
Volume27
Issue number22
DOIs
Publication statusPublished - 2019 Jan 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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    Miyamoto, K., Sano, K., Miyakawa, T., Niinomi, H., Toyoda, K., Vallés, A., & Omatsu, T. (2019). Generation of high-quality terahertz OAM mode based on soft-aperture difference frequency generation. Optics Express, 27(22), 31840-31849. https://doi.org/10.1364/OE.27.031840