Journal
OPTICS LETTERS
Volume 32, Issue 12, Pages 1620-1622Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.32.001620
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We demonstrate optical switching of electrically resonant terahertz planar metamaterials fabricated on ErAs/GaAs nanoisland superlattice substrates. Photoexcited charge carriers in the superlattice shunt the capacitive regions of the constituent elements, thereby modulating the resonant response of the metamaterials. A switching recovery time of 20 ps results from fast carrier recombination in the ErAs/GaAs superlattice substrates. (c) 2007 Optical Society of America.
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