Controlling steady-state second harmonic signal via linear and nonlinear Fano resonances

Date

2020-01-02

Author

Guenay, Mehmet
Artvin, Zafer
Bek, Alpan
TAŞGIN, MEHMET EMRE

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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Nonlinear signal even from a single molecule becomes visible at hot spots of plasmonic nanoparticles. In these structures, Fano resonances can control the nonlinear response in two ways. (i) A linear Fano resonance can enhance the hot spot field, resulting enhanced nonlinear signal. (ii) A nonlinear Fano resonance can enhance the nonlinear signal without enhancing the hot spot. In this study, we compare the enhancement of second harmonic signal at the steady-state obtained via these two methods. Since we are interested in the steady-state signal, we adapt a linear enhancement which works at the steady-state. This is different than the dark-hot resonances that appear in the transparency window due to enhanced plasmon lifetime.

Subject Keywords

Quantum plasmonics, Nonlinear optics, Fano resonance

URI

https://hdl.handle.net/11511/44378

Collections

Department of Physics, Article