Teraherz optically tunable dielectric metamaterials without fabrication

Abstract

We theoretically investigate the terahertz (THz) dielectric response of a semiconductor slab hosting a tunable grating photogenerated by the interference of two tilted infrared (IR) plane waves. In the case where the grating period is much smaller than the THz wavelength, we numerically evaluate the ordinary and extraordinary component of the effective permittivity tensor by resorting to electromagnetic full-wave simulation coupled to the dynamics of charge carriers excited by IR radiation. We show that the photo-induced metamaterial optical response can be tailored by varying the grating and it ranges from birefringent to hyperbolic to anisotropic negative dielectric without resorting to microfabrication.


Autore Pugliese

Tutti gli autori

  • C.Rizza , A.Ciattoni , L.Columbo , BRAMBILLA M

Titolo volume/Rivista

OPTICS LETTERS


Anno di pubblicazione

2013

ISSN

0146-9592

ISBN

Non Disponibile


Numero di citazioni Wos

Nessuna citazione

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Numero di citazioni Scopus

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Settori ERC

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Codici ASJC

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