Terahertz wave emission from plasmonic chiral metasurfaces

Takahiro Matsui, Satoshi Tomita, Motoki Asai, Yuzuru Tadokoro, Keisuke Takano, Makoto Nakajima, Masanori Hangyo, Hisao Yanagi

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Plasmonic chiral metasurfaces with pinwheellike 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.

Original languageEnglish
Article number157
JournalApplied Physics A: Materials Science and Processing
Issue number3
Publication statusPublished - 2016 Mar


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