We investigate the mid-infrared response of heavily doped germanium films and periodic arrays of nanoantennas by both continuous wave transmission/reflection spectroscopy and ultrafast pump-probe spectroscopy. We compare the data to finite-element modeling electromagnetic simulations of the subwavelength nanostructures. The plasma frequency of the doped or optically activated semiconductor extends in the 1000-2000 cm-1 range thus enabling access to molecular fingerprints.
Time- and frequency-resolved electrodynamics of germanium nanoantennas for mid-infrared plasmonics / Ortolani, M., Fischer, M.P., Baldassarre, L., Samarelli, A., Gallacher, K., Frigerio, J., Giliberti, V., Sakat, E., Schmidt, C., Leitenstorfer, A., Daniele, B., Isella, G., Paul, D.J., Biagioni, P.. - ELETTRONICO. - (2015), pp. 1-2. (40th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2015 Yasumoto International Academic Building (YIA) at the Chinese University of Hong Kong, chn 2015) [10.1109/IRMMW-THz.2015.7327717].
Time- and frequency-resolved electrodynamics of germanium nanoantennas for mid-infrared plasmonics
Ortolani, Michele
;Baldassarre, Leonetta
;Giliberti, Valeria
;
2015
Abstract
We investigate the mid-infrared response of heavily doped germanium films and periodic arrays of nanoantennas by both continuous wave transmission/reflection spectroscopy and ultrafast pump-probe spectroscopy. We compare the data to finite-element modeling electromagnetic simulations of the subwavelength nanostructures. The plasma frequency of the doped or optically activated semiconductor extends in the 1000-2000 cm-1 range thus enabling access to molecular fingerprints.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
