Difference between revisions of "Min Ah Seo"
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Dept. of PHYSICS & ASTRONOMY | Dept. of PHYSICS & ASTRONOMY | ||
Seoul National University | Seoul National University | ||
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E-mail : minahseo@phya.snu.ac.kr | E-mail : minahseo@phya.snu.ac.kr | ||
Latest revision as of 00:46, 29 October 2009
Min Ah Seo, Dept. of PHYSICS & ASTRONOMY Seoul National University E-mail : minahseo@phya.snu.ac.kr
Active Terahertz Metamaterials
We report on the terahertz (THz) switching based on the micro- and nano- sized resonators with metal-insulator phase transition of vanadium dioxide thin film. Terahertz wave transmission through subwavelength apertures is controlled by temperature and photo excitation driven refractive index change of substrate. Remarkably, the nano-patterned sample allows the extinction to fall by two orders of magnitudes with completely shutting-off the resonance characteristics. The extremely small apertures with dynamic control of dielectric film would find immediate applications in high modulation device.
