Title :
Parabolic-like nanoantennas fabrication by femtosecond laser pulses for strong-field plasmonics
Author :
Gubko, M.A. ; Ionin, A.A. ; Kudryashov, S.I. ; Makarov, S.V. ; Rudenko, A.A. ; Seleznev, L.V. ; Sinitsyn, D.V. ; Treshin, I.V. ; Husinsky, W. ; Nathala, C.S.R.
Author_Institution :
P.N. Lebedev Phys. Inst., Moscow, Russia
fDate :
June 30 2014-July 4 2014
Abstract :
We have demonstrated for the first time that an array of nanoantennas on an aluminum surface, fabricated using a double-pulse femtosecond laser irradiation scheme, results in a 28-fold enhancement of electron photoemission yield, driven by a third femtosecond laser pulse. The numerical electrodynamic modeling indicates that the electron emission is increased owing to instant local electromagnetic field enhancement near the nanoantenna, contributed by both the tip´s “lightning rod” effect and the focusing effect of the pit as a microreflector in parabolic nanoantenna.
Keywords :
antenna arrays; electrodynamics; high-speed optical techniques; laser materials processing; micro-optics; nanofabrication; nanophotonics; numerical analysis; optical arrays; optical fabrication; optical focusing; photoemission; plasmonics; Al; aluminum surface; double-pulse femtosecond laser irradiation scheme; electron photoemission yield; femtosecond laser pulses; local electromagnetic field enhancement; microreflector; nanoantenna array; numerical electrodynamic modeling; parabolic nanoantenna; parabolic-like nanoantennas; pit focusing effect; strong-field plasmonics; tip lightning rod effect; Focusing; femtosecond laser pulses; nanoantennas; plasmon;
Conference_Titel :
Laser Optics, 2014 International Conference
Conference_Location :
Saint Petersburg
Print_ISBN :
978-1-4799-3884-1
DOI :
10.1109/LO.2014.6886359
