Optical Activation of Germanium Plasmonic Antennas in the Mid Infrared
Mesoscale and Nanoscale Physics
2016-07-27 v2 Optics
Abstract
Impulsive interband excitation with femtosecond near-infrared pulses establishes a plasma response in intrinsic germanium structures fabricated on a silicon substrate. This direct approach activates the plasmonic resonance of the Ge structures and enables their use as optical antennas up to the mid-infrared spectral range. The optical switching lasts for hundreds of picoseconds until charge recombination red-shifts the plasma frequency. The full behavior of the structures is modeled by the electrodynamic response established by an electron-hole plasma in a regular array of antennas.
Keywords
Cite
@article{arxiv.1603.06339,
title = {Optical Activation of Germanium Plasmonic Antennas in the Mid Infrared},
author = {Marco P. Fischer and Christian Schmidt and Emilie Sakat and Johannes Stock and Antonio Samarelli and Jacopo Frigerio and Michele Ortolani and Douglas J. Paul and Giovanni Isella and Alfred Leitenstorfer and Paolo Biagioni and Daniele Brida},
journal= {arXiv preprint arXiv:1603.06339},
year = {2016}
}