4.8 Article

Nonlinear Forced Response of Plasmonic Nanostructures

Journal

PHYSICAL REVIEW LETTERS
Volume 128, Issue 10, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.128.103901

Keywords

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Funding

  1. Israel Science Foundation (ISF) [1750/18]
  2. Russell Berrie Nanotechnology Institute (RBNI) at the Technion
  3. Adams Fellowship Program of the Israel Academy of Science and Humanities

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This study reveals the nonlinear forced response of modal-nonmodal pairs of short-range surface plasmons in thin metal films using a nonradiating nonlinear source. Nonlinearly mediated direct access to nonmodal plasmons in a lossless regime is achieved. The findings can be applied to other forms of surface waves or optical nonlinearities for on-chip nonlinearly controlled nanophotonic devices.
Incorporating optical surface waves in nonlinear processes unlocks unique and sensitive nonlinear interactions wherein highly confined surface states can be accessed and explored. Here, we unravel the rich physics of modal-nonmodal state pairs of short-range surface plasmons in thin metal films by leveraging dark nonlinearity-a nonradiating nonlinear source. We control and observe the nonlinear forced response of these modal-nonmodal pairs and present nonlinearly mediated direct access to nonmodal plasmons in a lossless regime. Our study can be generalized to other forms of surface waves or optical nonlinearities, toward on-chip nonlinearly controlled nanophotonic devices.

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