Journal
OPTICS EXPRESS
Volume 19, Issue 27, Pages 26666-26671Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.19.026666
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- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1101171] Funding Source: National Science Foundation
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We demonstrated extraordinary THz transmission through ring apertures on a metal film. Transmission of 60% was obtained with an aperture-to-area ratio of only 1.4%. We show that the high transmission can be suppressed by over 18 dB with a thin layer of free carriers in the silicon substrate underneath the metal film. This result suggests that CMOS-compatible terahertz modulators can be built by controlling the carrier density near the aperture. (C) 2011 Optical Society of America
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