One- and two-dimensional photo-imprinted diffraction gratings for manipulating terahertz waves
Artikel i vetenskaplig tidskrift, 2013

Emerging technology based on artificial materials containing metallic structures has raised the prospect for unprecedented control of terahertz waves. The functionality of these devices is static by the very nature of their metallic composition, although some degree of tunability can be achieved by incorporating electrically biased semiconductors. Here, we demonstrate a photonic structure by projecting the optical image of a metal mask onto a thin GaAs substrate using a femtosecond pulsed laser source. We show that the resulting high-contrast pattern of photo-excited carriers can create diffractive elements operating in transmission, potentially providing a route to terahertz components with reconfigurable functionality.

gallium arsenide

diffraction gratings

optical materials

laser beam effects

III-V semiconductors

Författare

Ioannis Chatzakis

Philippe Tassin

Chalmers, Teknisk fysik, Kondenserade materiens teori

Luo Liang

Nian-Hai Shen

Lei Zhang

Jigang Wang

Thomas Koschny

Costas M. Soukoulis

Applied Physics Letters

0003-6951 (ISSN) 1077-3118 (eISSN)

Vol. 103 043101-

Styrkeområden

Nanovetenskap och nanoteknik

Ämneskategorier

Atom- och molekylfysik och optik

Annan elektroteknik och elektronik

Den kondenserade materiens fysik

DOI

10.1063/1.4813620