Speaker
Description
Plasmonics exploits the collective motion of conduction electrons in metals (plasmons), thus
enabling light to couple with nanoscale objects, with the consequent generation of a plenty of
novel and unexpected optical effects and functionalities. Plasmonic nanostructures have been
deeply studied in the last decade due to their crucial impact on several areas of nanoscience
and nanotechnology. Their unrivalled capability to squeeze light well beyond its diffraction
limit, leading to extremely confined and enhanced electromagnetic fields on the nanoscale at
optical frequencies, is of great interest for the prospect of real-life applications, such as
energy harvesting and photovoltaics, wave-guiding and lasing, optoelectronics, fluorescence
emission enhancement, plasmon-assisted bio-interfaces and nanomedicine. In this
framework, traditional studies of the resonant behavior of plasmonic nanoantennas rely on
standard intensity detection schemes. Up to date, the temporal dynamics of plasmonic
nanoantennas remains challenging. In the first part of the talk we will show that, by
combining femtosecond multi-THz time-domain spectroscopy and high-resolution confocal
microscopy, it is possible to measure full time- and field-resolved response of single
plasmonic antennas (see Fig. 1) [1]. In the second part of the talk, we will then show
practical applications of plasmonic nanostructures for molecular sensing [2,3], single cell
enhanced spectroscopy [4-6], optical trapping [7] and enhanced resonant energy transfer [8].
[1] M. P. Fischer, N. Maccaferri, K. Gallacher, J. Frigerio, G. Pellegrini, G. Isella, A.
Leitenstorfer, D. J. Paul, P. Biagioni, D. Brida, in preparation (2019).
[2] R. Verre, N. Maccaferri, K. Fleischer, M. Svedendahl, N. Odebo Länk, A. Dmitriev, P.
Vavassori, I. V. Shvets, M. Käll Nanoscale 8, 10576 (2016).
[3] P. Ponzellini, X. Zambrana-Puyalto, N. Maccaferri, L. Lanzanò, F. De Angelis, D. Garoli
Nanoscale 10, 17362 (2018).
[4] M. Ardini, J.-A. Huang, C. S. Sánchez, M. Z. Mousavi, V. Caprettini, N. Maccaferri, G.
Melle, G. Bruno, L. Pasquale, D. Garoli, F. De Angelis Sci. Rep. 8, 12652 (2018).
[5] V. Caprettini, J.-A. Huang, F. Moia, A. Jacassi, C. A. Gonani, N. Maccaferri, R.
Capozza, M. Dipalo, F. De Angelis Sci. Adv. 5, 1800560 (2018).
[6] J.-A. Huang, V. Caprettini, Y. Zhao, G. Melle, N. Maccaferri, L. Deleye, X. ZambranaPuyalto, M. Ardini, F. Tantussi, M. Dipalo, F. De Angelis Nano Lett. 19, 722 (2019).
[7] G. C. Messina, X. Zambrana-Puyalto, N. Maccaferri, D. Garoli, F. De Angelis
arXiv:1903.03865 (2019).
[8] X. Zambrana-Puyalto N.Maccaferri, P. Ponzellini, G. Giovannini, F. De Angelis, D.
Garoli Nanoscale Advances, in press (2019).
| Topic | 14. Applications and interdisciplinary subjects |
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