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Terahertz wave emission from plasmonic chiral metasurfaces

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Abstract

Plasmonic chiral metasurfaces with pinwheel-like structures are fabricated on silver films using a focused ion-beam milling technique. In time-domain spectroscopy, we observe terahertz (THz) wave emission from metasurfaces irradiated by a near-infrared Ti:sapphire ultrashort pulsed laser. The origin of the THz wave generation is likely to be tunnelling ionization accompanied with photoelectron acceleration by ponderomotive force. Numerical simulation is carried out toward improvement of the chiral metasurfaces for better emission of circularly polarized THz waves.

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Acknowledgments

The authors acknowledge valuable contribution by K. Miyake in the FIB milling and fruitful discussion with K. Iwami and S. Ohno. English proofreading by L. McDowell is also acknowledged. This work was supported by MEXT/JSPS KAKENHI (Grants Nos. 22109003, 22109005 and 26287065).

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Authors and Affiliations

  1. Graduate School of Materials Science, Nara Institute of Science and Technology, Ikoma, Nara, 630-0192, Japan

    Takahiro Matsui, Satoshi Tomita & Hisao Yanagi

  2. Institute of Laser Engineering, Osaka University, Suita, Osaka, 565-0871, Japan

    Motoki Asai, Yuzuru Tadokoro, Keisuke Takano, Makoto Nakajima & Masanori Hangyo

Authors
  1. Takahiro Matsui
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  2. Satoshi Tomita
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  3. Motoki Asai
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  4. Yuzuru Tadokoro
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  5. Keisuke Takano
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  6. Makoto Nakajima
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  7. Masanori Hangyo
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  8. Hisao Yanagi
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Corresponding author

Correspondence to Satoshi Tomita.

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Deceased: Masanori Hangyo.

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Matsui, T., Tomita, S., Asai, M. et al. Terahertz wave emission from plasmonic chiral metasurfaces. Appl. Phys. A 122, 157 (2016). https://doi.org/10.1007/s00339-016-9657-y

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  • DOI: https://doi.org/10.1007/s00339-016-9657-y

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