Version 1
: Received: 13 May 2024 / Approved: 13 May 2024 / Online: 13 May 2024 (07:58:24 CEST)
How to cite:
Shan, F.; Zhu, Y.; Huang, J. Polarization-dependent Plasmon Coupling in Gold Nanoparticles and Gold thin Film Systems. Preprints2024, 2024050801. https://doi.org/10.20944/preprints202405.0801.v1
Shan, F.; Zhu, Y.; Huang, J. Polarization-dependent Plasmon Coupling in Gold Nanoparticles and Gold thin Film Systems. Preprints 2024, 2024050801. https://doi.org/10.20944/preprints202405.0801.v1
Shan, F.; Zhu, Y.; Huang, J. Polarization-dependent Plasmon Coupling in Gold Nanoparticles and Gold thin Film Systems. Preprints2024, 2024050801. https://doi.org/10.20944/preprints202405.0801.v1
APA Style
Shan, F., Zhu, Y., & Huang, J. (2024). Polarization-dependent Plasmon Coupling in Gold Nanoparticles and Gold thin Film Systems. Preprints. https://doi.org/10.20944/preprints202405.0801.v1
Chicago/Turabian Style
Shan, F., Yanyan Zhu and Jingyi Huang. 2024 "Polarization-dependent Plasmon Coupling in Gold Nanoparticles and Gold thin Film Systems" Preprints. https://doi.org/10.20944/preprints202405.0801.v1
Abstract
The characteristics of gap plasmon formed by nanoparticle-on-mirror (NPOM) structure composed of metal nanoparticles (MNP) and metal thin films have aroused the interest of various optoelectronic devices. The resonant spectrum obtained by the internal coupling effect of gap can be flexibly controlled by the polarization of incident light and the thickness of the dielectric layer between MNP and metal thin films. We have theoretically studied the resonance spectra of polarization-dependent gold ellipsoidal nanoparticles (GENP) and gold thin films in the gap region of NPOM structures. GENP and gold thin films are separated by a dielectric layer with a refractive index of 1.36. We observe that the intensity of the local electric field resonance peak in the gap region is inversely proportional to the polarization angle. Similarly, the intensity of the local electric field resonance peak in the gap region is inversely proportional to the thickness of the dielectric layer. We have obtained more than 2200 V/m local electric field intensity (dielectric layer thickness 0.3nm). Finally, the resonant peak wavelength of the electric field in the gap region of the NPOM structure is also controlled by the polarization angle of the incident light and the thickness of the dielectric layer.
Keywords
coupling; plasmon; metal nanoparticles; local electric field; polarization
Subject
Chemistry and Materials Science, Surfaces, Coatings and Films
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
