Abstract
We demonstrate controllable light deflection in thick metal gratings with periodic subwavelength slits filled with an active material. Under specific illumination conditions, the grating becomes nearly transparent and acts as a uniform optical phased-array antenna where the phase of the radiating elements is controlled by modifying the index of refraction of the material that fills each slit. The beam-steering operational regime occurs in a wide wavelength band, and it is relatively insensitive to the input angle.
©2012 Optical Society of America
Full Article | PDF ArticleMore Like This
Mohsen Bahramipanah, Seyed Abdollah Mirtaheri, and Mohammad Sadegh Abrishamian
Opt. Lett. 37(4) 527-529 (2012)
Enes Battal and Ali Kemal Okyay
Opt. Lett. 38(6) 983-985 (2013)
L. Li, T. Li, S. M. Wang, and S. N. Zhu
Opt. Lett. 37(24) 5091-5093 (2012)