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Active terahertz metamaterial devices. Nature 2006; 444: 597–600. 20 Padilla WJ, Taylor AJ, Highstrete C, Lee M, Averitt RD. Dynamical electric and magnetic metamaterial response at terahertz frequencies. Phys Rev Lett 2006; 96: 107401. 21 Chen H-T, O'Hara JF, Azad AK, Taylor AJ, ...
This is especially important for the technologically relevant terahertz (1 THz = 10(12) Hz) frequency regime; many materials inherently do not respond to THz radiation, and the tools that are necessary to construct devices operating within this range-sources, lenses, switches, modulators and ...
et al. Photoinduced handedness switching in terahertz chiral metamolecules. Nat. Commun. 3, 942–948 (2012). 33. Chen, H. T. et al. Active terahertz metamaterial devices. Nature 444, 597–600 (2006). 34. Ma, X. L. et al. An Active Metamaterial for Polarization Manipulating. Adv. ...
This paper presents the design and process of two highly sensitive sensors working in the terahertz band. The sensors comprise the quartz substrate, medium, reflection plate, and metal resonant layer with a symmetrical single-slot patch array. The devices help study the electrically induced permittivi...
Finally, the linear frequency conversion of THz waves in a rapidly time锕檃riant THz metamaterial is briefly discussed in the more general context of spatiotemporal control of light. Passive and active metamaterials are important to the development of unconventional terahertz optical devices due to ...
The modeling and characterization of a broadband frequency agile metamaterial-based cavity antenna around 2 GHz is reported in this article.An electronically active metasurface composed of simultaneously a capacitive and an inductive grid is used as a partially reflecting surface (PRS), and the cavity...
By integrating photoconductive silicon into the metamaterial unit cell, a giant switching of the transparency window occurs under excitation of ultrafast optical pulses, allowing for an optically tunable group delay of the terahertz light. This work opens up the possibility for designing novel chip-...
Thus, the optical stimulation of metamaterial devices made of bilayer metallic patterns (counter-facing gammadion shaped resonators with different sizes) on a semiconductor substrate allowed terahertz polarization rotation angles as large as 45°14. In addition, the semiconductor material (epitaxial Si ...
2. Active Terahertz Metamaterial Devices By way of example embodiment, the metamaterial device described herein is based on an electric analogue to split-ring resonators (SRRs). FIG. 1A-1C illustrates by way of example embodiment 10 of a resonant metamaterial modulator. In FIG. 1A a substrate ...