Optical Switching of Mid-Infrared Plasmonic Nanoantennas Based on Germanium
- Fischer, Marco P.
- Schmidt, Christian
- Stock, Johannes
- Sakat, Emilie
- Samarelli, Antonio
- Frigerio, Jacopo
- Biagioni, Paolo
- Paul, Douglas
- Isella, Giovanni
- Leitenstorfer, Alfred
- Brida, Daniele
DOIAbstract
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
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