Abstract-Terahertz active spatial filtering through optically tunable hyperbolic metamaterials

http://arxiv.org/abs/1205.6708

Authors:Carlo Rizza, Alessandro Ciattoni, Elisa Spinozzi, Lorenzo Columbo

Submitted on 30 May 2012)

We theoretically consider infrared-driven hyperbolic metamaterials able to spatially filtering terahertz radiation. The metamaterial is a slab made of alternating semiconductor and dielectric layers whose homogenized uniaxial response, at terahertz frequencies, shows principal permittivities of different signs. The gap provided by metamaterial hyperbolic dispersion allows the slab to stop spatial frequencies within a bandwidth tunable by changing the infrared radiation intensity. We numerically prove the device functionality by resorting to full wave simulation coupled to the dynamics of charge carries photoexcited by infrared radiation in semiconductor layers.

Comments:	3 pages, 4 figures. Submitted for publication on Applied Physics Letters
Subjects:	Optics (physics.optics)
Cite as:	arXiv:1205.6708v1 [physics.optics]

Submission history

From: Alessandro Ciattoni [view email]
[v1] Wed, 30 May 2012 14:48:16 GMT (244kb)