Imaging and characterization of femtosecond surface plasmon wave packets on a silver film

Author

Kubo, Atsushi

Author_Institution

Inst. of Phys., Univ. of Tsukuba, Tsukuba, Japan

fYear

2012

fDate

2-5 July 2012

Firstpage

1

Lastpage

4

Abstract

Irradiations of nano-structured metal films by ultrashort laser pulses excite surface plasmon wave packets, which propagate along the metal-dielectric interface for tens of femtoseconds. Recently developed novel time-resolved microscopic methods enable to take movies of the evolutions of them. We show photoemission electron microscopy and two-photon fluorescence microscopy, respectively combined with near-ultraviolet and near-infrared 10-femtosecond lasers, reveal dissipative propagations of wave packets launched from nano-scale slits formed in a silver film. The dynamical properties of wave packets such as group and phase velocities, and propagation lengths are well comparable to the values evaluated by using complex wavevectors of the surface plasmon polariton modes.

Keywords

fluorescence; high-speed optical techniques; laser beam effects; metallic thin films; nanostructured materials; photoelectron microscopy; polaritons; silver; surface plasmons; Ag; complex wavevectors; dissipative propagations; femtosecond surface plasmon wave packets; metal-dielectric interface; nanostructured metal films; near-infrared 10-femtosecond lasers; near-ultraviolet 10-femtosecond lasers; photoemission electron microscopy; surface plasmon polariton modes; time-resolved microscopy; two-photon fluorescence microscopy; ultrashort laser pulse irradation; Films; Fluorescence; Microscopy; Optical surface waves; Plasmons; Surface waves; Ultrafast optics; femtosecond; microscopy; silver; surface plasmon; time-resolved; wave packet;

fLanguage

English

Publisher

ieee

Conference_Titel

Transparent Optical Networks (ICTON), 2012 14th International Conference on

Conference_Location

Coventry

ISSN

2161-2056

Print_ISBN

978-1-4673-2228-7

Electronic_ISBN

2161-2056

Type

conf

DOI

10.1109/ICTON.2012.6254496

Filename

6254496