Interference effects in plasmon-enhanced metal photoluminescence

J. A. Nash; T. V. Shahbazyan

doi:10.1117/12.2676831

4 October 2023 Interference effects in plasmon-enhanced metal photoluminescence

J. A. Nash, T. V. Shahbazyan

Proceedings Volume 12646, Metamaterials, Metadevices, and Metasystems 2023; 1264603 (2023) https://doi.org/10.1117/12.2676831
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States

Abstract

We present an analytical model for the plasmonic enhancement of metal photoluminescence (MPL) in metal nanostructures with a characteristic size below the diffraction limit. In such systems, the primary mechanism of MPL enhancement is the excitation of localized surface plasmons (LSP) by recombining carriers followed by photon emission due to LSP radiative decay. For plasmonic nanostructures of arbitrary shape, we obtain a universal expression for the MPL Purcell factor that describes the plasmonic enhancement of MPL in terms of the metal dielectric function, LSP frequency, and system volume. We find that the lineshape of the MPL spectrum is affected by the interference between direct carrier recombination processes and those mediated by plasmonic antenna which leads to a blueshift of MPL spectral band relative to LSP resonance in scattering spectra observed in numerous experiments.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

J. A. Nash and T. V. Shahbazyan "Interference effects in plasmon-enhanced metal photoluminescence", Proc. SPIE 12646, Metamaterials, Metadevices, and Metasystems 2023, 1264603 (4 October 2023); https://doi.org/10.1117/12.2676831

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