Plasmon-enhanced four-wave mixing by nanoholes in thin gold films
Artikel i vetenskaplig tidskrift, 2014

Nonlinear plasmonics opens up for wavelength conversion, reduced interaction/emission volumes, and nonlinear enhancement effects at the nanoscale with many compelling nanophotonic applications foreseen. We investigate nonlinear plasmonic responses of nanoholes in thin gold films by exciting the holes individually with tightly focused laser beams, employing a degenerated pump/probe and Stokes excitation scheme. Excitation of the holes results in efficient generation of both narrowband four-wave mixing (FWM) and broadband multiphoton excited luminescence, blueshifted relative to the excitation beams. Clear enhancements were observed when matching the pump/probe wavelength with the hole plasmon resonance. These observations show that the FWM generation is locally excited by nanoholes and has a resonant behavior primarily governed by the dimensions of the individual holes.

arrays

metal-films

nanoparticles

nanoholes

nanostructures

Författare

Henning Hagman

Chalmers, Kemi- och bioteknik, Molekylär mikroskopi

Olof Bäcke

Chalmers, Teknisk fysik, Eva Olsson Group

Juris Kiskis

Chalmers, Kemi- och bioteknik, Molekylär mikroskopi

Fredrik Svedberg

Chalmers, Kemi- och bioteknik, Molekylär mikroskopi

Magnus Jonsson

Delft University of Technology

Fredrik Höök

Chalmers, Teknisk fysik, Biologisk fysik

Annika Enejder

Chalmers, Kemi- och bioteknik, Molekylär mikroskopi

Optics Letters

0146-9592 (ISSN) 1539-4794 (eISSN)

Vol. 39 1001-1004

Styrkeområden

Nanovetenskap och nanoteknik

Ämneskategorier

Nanoteknik

DOI

10.1364/OL.39.001001