Photo-designed terahertz devices

PLUTO / PLUTO-2 Spatial Light Modulators
Pulse Application / -Shaping
Published on:
Authors: Takanori Okada & Koichiro Tanaka
Abstract:

“Technologies are being developed to manipulate electromagnetic waves using artificially structured materials such as photonic crystals and metamaterials, with the goal of creating primary optical devices. For example, artificial metallic periodic structures show potential for the construction of devices operating in the terahertz frequency regime. Here we demonstrate the fabrication of photo-designed terahertz devices that enable the real-time, wide-range frequency modulation of terahertz electromagnetic waves. These devices are comprised of a photo-induced, planar periodic-conductive structure formed by the irradiation of a silicon surface using a spatially modulated, femtosecond optical pulsed laser. We also show that the modulation frequency can be tuned by the structural periodicity, but is hardly affected by the excitation power of the optical pump pulse. We expect that our findings will pave the way for the construction of all-optical compact operating devices, such as optical integrated circuits, thereby eliminating the need for materials fabrication processes.”

Open Access

Publication: Scientific Reports
Issue/Year: Scientific Reports, Volume 1, Article number:121, (2011)
DOI: 10.1038/srep00121
Link: https://doi.org/10.1038/srep00121

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