Abstract
We have investigated light beaming through a single slit in a silver thin film with periodic gratings on the output side in the mid-infrared wavelength range. We show that light beaming in mid-infrared is mainly controlled by spoof surface plasmons. We take account of both the dispersion relation and the phase-matching condition of spoof surface plasmons to obtain good beaming efficiency. Through engineering the geometrical parameters of the grating structures, we can achieve the desired near-field and far-field distribution in mid-infrared.
© 2010 Optical Society of America
Full Article | PDF ArticleMore Like This
Nanfang Yu and Federico Capasso
J. Opt. Soc. Am. B 27(11) B18-B35 (2010)
Yujiro Kushiyama, Takuji Arima, and Toru Uno
Opt. Express 20(16) 18238-18247 (2012)
Yinghao Yuan, Jinsong Liu, Jian He, and Jianquan Yao
J. Opt. Soc. Am. B 28(11) 2674-2679 (2011)