Work

Terahertz optically tunable dielectric metamaterials without microfabrication

Year: 2013

Type: article

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.

Source: Optics Letters

DOI: 10.1364/ol.38.001307

Authors: Carlo Rizza, Alessandro Ciattoni, Lorenzo Columbo, Massimo Brambilla, Franco Prati

Institutions: University of Insubria, Superconducting and other Innovative Materials and Devices Institute, National Research Council

Language: English

Topic: Metamaterials and Metasurfaces Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2016081417

FWCI: 1.176

Cites: 24

Cited by: 20

Related to: 10