Terahertz wave emission from plasmonic chiral metasurfaces

被引：0
|
作者：
Takahiro Matsui
Satoshi Tomita
Motoki Asai
Yuzuru Tadokoro
Keisuke Takano
Makoto Nakajima
Masanori Hangyo
Hisao Yanagi
机构：
[1] Nara Institute of Science and Technology,Graduate School of Materials Science
[2] Osaka University,Institute of Laser Engineering
来源：
Applied Physics A | 2016年 / 122卷
关键词：
Electric Field Distribution; Ponderomotive Force; Asymmetric Mode; Optical Parametric Amplifier; Show Reflection Spectrum;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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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