One- and two-dimensional photo-imprinted diffraction gratings for manipulating terahertz waves
Journal article, 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.

optical materials

III-V semiconductors

laser beam effects

diffraction gratings

gallium arsenide


Ioannis Chatzakis

Iowa State University

Philippe Tassin

Iowa State University

Luo Liang

Iowa State University

Nian-Hai Shen

Iowa State University

Lei Zhang

Iowa State University

Jigang Wang

Iowa State University

Thomas Koschny

Iowa State University

Costas M. Soukoulis

Iowa State University

Applied Physics Letters

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

Vol. 103 4 043101-

Areas of Advance

Nanoscience and Nanotechnology (SO 2010-2017, EI 2018-)

Subject Categories

Atom and Molecular Physics and Optics

Other Electrical Engineering, Electronic Engineering, Information Engineering

Condensed Matter Physics



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