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arXiv · 2108.06872

Strong-field control of plasmonic properties in core-shell nanoparticles

Jeffrey Powell·Jianxiong Li·Adam Summers·Seyyed Javad Robatjazi·Michael Davino·Philipp Rupp·Erfan Saydanzad·Christopher M. Sorensen·Daniel Rolles·Matthias F. Kling·Carlos Trallero-Herrero·Uwe Thumm·Artem Rudenko
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Abstract

The strong-field control of plasmonic nanosystems opens up new perspectives for nonlinear plasmonic spectroscopy and petahertz electronics. Questions, however, remain regarding the nature of nonlinear light-matter interactions at sub-wavelength spatial and ultrafast temporal scales. Addressing this challenge, we investigated the strong-field control of the plasmonic response of Au nanoshells with a SiO$_2$ core to an intense laser pulse. We show that the photoelectron energy spectrum from these core-shell nanoparticles displays a striking transition between the weak and strong-field regime. This observed transition agrees with the prediction of our modified Mie-theory simulation that incorporates the nonlinear dielectric nanoshell response. The demonstrated intensity-dependent optical control of the plasmonic response in prototypical core-shell nanoparticles paves the way towards ultrafast switching and opto-electronic signal modulation with more complex nanostructures.

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Jeffrey Powell, Jianxiong Li, Adam Summers, Seyyed Javad Robatjazi, Michael Davino, Philipp Rupp, Erfan Saydanzad, Christopher M. Sorensen, Daniel Rolles, Matthias F. Kling, Carlos Trallero-Herrero, Uwe Thumm, Artem Rudenko. 2021-08-16. Strong-field control of plasmonic properties in core-shell nanoparticles. https://doi.org/10.1021/acsphotonics.2c00663

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