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Optical Switching of Mid-Infrared Plasmonic Nanoantennas Based on Germanium

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Abstract

Germanium nanoantennas are activated by triggering a mid-infrared plasma response via ultrafast interband excitation. Femtosecond control of the intrinsic semiconductor allows complete activation of the plasmonic resonance for hundreds of picoseconds.

© 2015 Optical Society of America

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