Ultimate limit of field confinement by surface plasmon polaritons

Faraday Discussions
Jacob B Khurgin

Abstract

We show that electric field confinement in surface plasmon polaritons propagating at metal/dielectric interfaces enhances the loss due to Landau damping, which effectively limits the degree of confinement itself. We prove that Landau damping, and associated with it surface collision damping, follow directly from the Lindhard formula for the dielectric constant of a free electron gas. Furthermore, we demonstrate that even if all of the conventional loss mechanisms, caused by phonons, electron-electron interactions, and interface roughness scattering, were eliminated, the maximum attainable degree of confinement and the loss accompanying it would not change significantly compared to the best existing plasmonic materials, such as silver.

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Citations

Aug 19, 2015·Nano Letters·Stephan J P KressDavid J Norris
Jul 28, 2015·Nano Letters·Mickael BuretAlexandre Bouhelier
Jan 4, 2017·Nature Communications·T K HakalaP Törmä
Mar 8, 2017·Nano Letters·Jan MertensJeremy J Baumberg
Sep 22, 2017·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Hai-Yao Deng
Apr 30, 2017·Physical Review Letters·Thomas ChristensenN Asger Mortensen
Aug 21, 2019·ACS Applied Materials & Interfaces·Jianhan YangHui Ye
Nov 15, 2019·Chemical Reviews·Alexandra GelléAudrey Moores

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