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

doi:10.1364/OE.27.031840

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

IMRAM - Materials-Measurement Hybrid Research Center

Chiba University

Research output: Contribution to journal › Article › peer-review

29 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 language	English
Pages (from-to)	31840-31849
Number of pages	10
Journal	Optics Express
Volume	27
Issue number	22
DOIs	https://doi.org/10.1364/OE.27.031840
Publication status	Published - 2019

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10.1364/OE.27.031840

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title = "Generation of high-quality terahertz OAM mode based on soft-aperture difference frequency generation",

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.",

author = "Katsuhiko Miyamoto and Kazuki Sano and Takahiro Miyakawa and Hiromasa Niinomi and Kohei Toyoda and Adam Vall{\'e}s and Takashige Omatsu",

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AU - Miyamoto, Katsuhiko

AU - Sano, Kazuki

AU - Miyakawa, Takahiro

AU - Niinomi, Hiromasa

AU - Toyoda, Kohei

AU - Vallés, Adam

AU - Omatsu, Takashige

N1 - Funding Information: Japan Society for the Promotion of Science (16H06507, 18H03884, 19K05299). Publisher Copyright: © 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

PY - 2019

Y1 - 2019

N2 - 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.

AB - 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.

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

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