Experimental verification of the intrinsic ultrafast delayed nonlinearity of gold

Morten Bache, Oleg Lysenko, Nicolas Olivier, Anatoly V. Zayats, Andrei Lavrinenko

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearchpeer-review

Abstract

Surface plasmon polaritons (SPPs) in plasmonic metal waveguides can excite a third-order nonlinear response [1] much akin the well-known self-phase modulation (SPM) and two-photon absorption seen in light propagating in dielectric waveguides. In metals, the nonlinearity mainly arises as a self-acting effect: after absorption of the incident light the nonlinearity arises due to hot-electron contributions from changes of the intrinsic electronic lattice temperature. Using the so-called two-temperature model (TTM), the characteristic thermalization time of free-electrons in noble metals, such as gold, is described by an intrinsic delayed response function acting on a femtosecond-picosecond scale [1], explaining why the measured χ(3) values of gold are affected by the laser pulse duration. Here we show experimental data performed using picosecond [2] and femtosecond [3] laser pulses that for the first time allows to quantitatively connect the measured χ(3) values with the nonlinear coefficient of a nonlinear Schrödinger equation (NLSE) using the TTM to derive the nonlinearity.
Original languageEnglish
Title of host publication2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
PublisherIEEE
Publication date2017
Pages1
ISBN (Electronic)978-1-5090-6736-7
DOIs
Publication statusPublished - 2017
EventThe European Conference on Lasers and Electro-Optics, CLEO_Europe 2017 - Munich (ICM), Germany., Munich, Germany
Duration: 25 Jun 201729 Jun 2017
http://www.cleoeurope.org/

Conference

ConferenceThe European Conference on Lasers and Electro-Optics, CLEO_Europe 2017
LocationMunich (ICM), Germany.
Country/TerritoryGermany
CityMunich
Period25/06/201729/06/2017
Internet address

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