Proceedings ArticleDOI
Electrical Control of Terahertz Metamaterials
Hou-Tong Chen,Willie J. Padilla,Joshua M. O. Zide,Arthur C. Gossard,Antoinette J. Taylor,Richard D. Averitt +5 more
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TLDR
In this paper, the authors demonstrated real-time switchable terahertz metamaterial via external voltage bias to modify the capacitive elements, thereby achieved effective control and manipulation of freely propagating tera-hertz waves.Abstract:
The metamaterials resonant response significantly enhances THz-wave/material interaction. We demonstrated real-time switchable THz metamaterial via external voltage bias to modify the metamaterial capacitive elements, thereby achieved effective control and manipulation of freely propagating terahertz waves.read more
References
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Experimental Verification of a Negative Index of Refraction
TL;DR: These experiments directly confirm the predictions of Maxwell's equations that n is given by the negative square root ofɛ·μ for the frequencies where both the permittivity and the permeability are negative.
Journal ArticleDOI
Materials for terahertz science and technology
Bradley Ferguson,Xi-Cheng Zhang +1 more
TL;DR: Terahertz spectroscopy and imaging provide a powerful tool for the characterization of a broad range of materials, including semiconductors and biomolecules, as well as novel, higher-power terahertz sources.
PatentDOI
Active terahertz metamaterial devices
TL;DR: An active metamaterial device capable of efficient real-time control and manipulation of terahertz radiation is demonstrated, which enables modulation of THz transmission by 50 per cent, an order of magnitude improvement over existing devices.
Journal ArticleDOI
Terahertz magnetic response from artificial materials.
Ta-Jen Yen,Ta-Jen Yen,Ta-Jen Yen,Willie J. Padilla,Willie J. Padilla,Willie J. Padilla,Nicholas X. Fang,Nicholas X. Fang,Nicholas X. Fang,D. C. Vier,D. C. Vier,D. C. Vier,David R. Smith,David R. Smith,David R. Smith,John B. Pendry,John B. Pendry,John B. Pendry,Dmitri Basov,Dmitri Basov,Dmitri Basov,Xiang Zhang,Xiang Zhang,Xiang Zhang +23 more
TL;DR: It is shown that magnetic response at terahertz frequencies can be achieved in a planar structure composed of nonmagnetic conductive resonant elements and suggested that artificial magnetic structures, or hybrid structures that combine natural and artificial magnetic materials, can play a key role in teraHertz devices.
Journal ArticleDOI
Dynamical electric and magnetic metamaterial response at terahertz frequencies.
TL;DR: Utilizing terahertz time domain spectroscopy, the electromagnetic response of planar split ring resonators fabricated on GaAs is characterized and optical excitation is sufficient to turn off the electric resonance demonstrating the potential of SRR terAhertz switches.