Application of the coupled classical oscillators model to the Fano resonance build-up in a plasmonic nanosystem

We study the excitation dynamics of Fano resonance within the classical model framework of two linear coupled oscillators. An exact solution for the model with a damped harmonic force is obtained. The details of growth a Fano profile under the harmonic excitation is shown. For incident ultra-wideban...

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Bibliographic Details
Published inarXiv.org
Main Authors Golovinski, P A, Yakovets, A V, Khramov, E S
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 22.03.2018
Subjects
Accumulation
Broadband
Fano resonance
Femtosecond pulses
Frequency scanning
Harmonic excitation
Mathematical models
Nanoparticles
Oscillators
Quantum dots
Recording
Resonance scattering
Response functions
Time dependence
Ultrawideband
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Summary:We study the excitation dynamics of Fano resonance within the classical model framework of two linear coupled oscillators. An exact solution for the model with a damped harmonic force is obtained. The details of growth a Fano profile under the harmonic excitation is shown. For incident ultra-wideband pulse, the reaction of a system becomes universal and coincides with the time-dependent response function. The results of numerical calculations clarify two alternative ways for experimental measurement of the complete characteristics of a system: direct observation of the system response to a monochromatic force by frequency scanning or recording of time-dependent response to the delta-pulse. As a specific example, time-dependent excitation in a system consisting of a quantum dot and a metal nanoparticle is calculated. Then it is shown the applicability of the extended model of damped oscillators with radiative correction to describe the build-up a plasmon Fano resonance in a scattering of a femtosecond laser pulse by nanoantenna.
ISSN:2331-8422