Nonlinear plasmonics at high temperatures

by Yonatan Sivan

at Quantum optics seminar

Thu, 22 Jun 2017, 15:30
Physics building (#54) room 207

Abstract

Recently intriguing experimental results of the scattering of intense visible CW light from single Au and Ag nanoparticles were reported in 1 Specifically it was shown that at moderately high incident intensities the scattering was lower than the linear prediction showing saturation like behaviour whereas for even higher incident intensities the scattering grew rapidly even exceeding the linear prediction Notably this is one of the highest nonlinear responses ever reported as more than a 100 strong effect is obtained within a deep subwavelength volume and probably the first quantitative experimental study of the slow nonlinearity of metals Most remarkably no convincing explanation to the physical origin of this effect was reported We show that the initial decrease of the scattering can be explained by the thermal nonlinear optical response of the metal to CW light 2 In contrast to the multitude of studies of the ultrafast regime and the electron temperature contribution we provide an elaborate solid state model that explains for the first time the dependence of the metal permittivity on the lattice temperature Lastly we discuss possible explanations of the consequent increase of scattering and discuss the applications of such slow nonlinearity mostly in the domain of photo chemistry and photo catalysis thermal emission engineering etc References 1 S W Chu et al Saturation and reverse saturation of scattering in a single plasmonic nanoparticle ACS Photon 2013 1:32 37 Y T Chen et al Study of Nonlinear Plasmonic Scattering in Metallic Nanoparticles ACS Photonics 2016 3:1432 1439 2 Y Sivan S W Chu Nonlinear plasmonics at high temperatures Nanophotonics 2017 6:317 328

Created on 15-06-2017 by Bar Lev, Yevgeny (ybarlev)
Updaded on 15-06-2017 by Bar Lev, Yevgeny (ybarlev)