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One- and two-dimensional photo-imprinted diffraction gratings for manipulating terahertz waves

Ioannis Chatzakis ; Philippe Tassin (Institutionen för teknisk fysik, Kondenserade materiens teori) ; Luo Liang ; Nian-Hai Shen ; Lei Zhang ; Jigang Wang ; Thomas Koschny ; Costas M. Soukoulis
Applied Physics Letters (0003-6951). Vol. 103 (2013), 4, p. 043101.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: diffraction gratings, gallium arsenide, III-V semiconductors, laser beam effects, optical materials



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Denna post skapades 2013-10-02. Senast ändrad 2014-01-30.
CPL Pubid: 184544

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kondenserade materiens teori (1900-2015)

Ämnesområden

Nanovetenskap och nanoteknik
Optisk fysik
Den kondenserade materiens fysik
Övrig elektroteknik, elektronik och fotonik

Chalmers infrastruktur