Titlebar

Export bibliographic data
Literature by the same author
plus on the publication server
plus at Google Scholar

 

Quantitative Modeling of the Third Harmonic Emission Spectrum of Plasmonic Nanoantennas

Title data

Hentschel, Mario ; Utikal, Tobias ; Giessen, Harald ; Lippitz, Markus:
Quantitative Modeling of the Third Harmonic Emission Spectrum of Plasmonic Nanoantennas.
In: Nano Letters. Vol. 12 (July 2012) Issue 7 . - pp. 3778-3782.
ISSN 1530-6992
DOI: https://doi.org/10.1021/nl301686x

Abstract in another language

Plasmonic dimer nanoantennas are characterized by a strong enhancement of the optical field, leading to large nonlinear effects. The third harmonic emission spectrum thus depends strongly on the antenna shape and size as well as on its gap size. Despite the complex shape of the nanostructure, we find that for a large range of different geometries the nonlinear spectral properties are fully determined by the linear response of the antenna. We find excellent agreement between the measured spectra and predictions from a simple nonlinear oscillator model. We extract the oscillator parameters from the linear spectrum and use the amplitude of the nonlinear perturbation only as scaling parameter of the third harmonic spectra. Deviations from the model only occur for gap sizes below 20 nm, indicating that only for these small distances the antenna hot spot contributes noticeable to the third harmonic generation. Because of its simplicity and intuitiveness, our model allows for the rational design of efficient plasmonic nonlinear light sources and is thus crucial for the design of future plasmonic devices that give substantial enhancement of nonlinear processes such as higher harmonics generation as well as difference frequency mixing for plasmonically enhanced terahertz generation.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Split-ring resonators; 2nd-harmonic generation; 3rd-harmonic generation; magnetic metamaterials; optical-response; quantum-dot; light; nanostructures; antennas; arrays; plasmonics; nanoantennas; nonlinear optics; oscillator model; field enhancement
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik III - Nanooptik > Lehrstuhl Experimentalphysik III - Nanooptik - Univ.-Prof. Dr. Markus Lippitz
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik III - Nanooptik
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 13 Nov 2015 13:51
Last Modified: 16 Nov 2015 08:00
URI: https://eref.uni-bayreuth.de/id/eprint/22214