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Title: Surface Plasmon Coupling and Control Using Spherical Cap Structures

Abstract

Propagating surface plasmons (PSPs) launched from a protruded silver spherical cap structure are investigated using photoemission electron microscopy (PEEM) and finite difference time domain (FDTD) calculations. Our combined experimental and theoretical findings reveal that PSP coupling efficiency is comparable to conventional etched-in plasmonic coupling structures. Additionally, plasmon propagation direction can be varied by a linear rotation of the driving laser polarization. A simple geometric model is proposed in which the plasmon direction selectivity is proportional to the projection of the linear laser polarization on the surface normal. An application for the spherical cap coupler as a gate device is proposed. Overall, our results indicate that protruded cap structures hold great promise as elements in emerging surface plasmon applications.

Authors:
; ; ; ORCiD logo; ORCiD logo
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1371972
Report Number(s):
PNNL-SA-125352
Journal ID: ISSN 1948-7185; 49123; KC0301050
DOE Contract Number:
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Physical Chemistry Letters; Journal Volume: 8; Journal Issue: 12
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; plasmonics; Photoemission; Ultrasensitive; Chemical; Electron; Microscopy; Environmental Molecular Sciences Laboratory

Citation Formats

Gong, Yu, Joly, Alan G., Zhang, Xin, El-Khoury, Patrick Z., and Hess, Wayne P. Surface Plasmon Coupling and Control Using Spherical Cap Structures. United States: N. p., 2017. Web. doi:10.1021/acs.jpclett.7b00852.
Gong, Yu, Joly, Alan G., Zhang, Xin, El-Khoury, Patrick Z., & Hess, Wayne P. Surface Plasmon Coupling and Control Using Spherical Cap Structures. United States. doi:10.1021/acs.jpclett.7b00852.
Gong, Yu, Joly, Alan G., Zhang, Xin, El-Khoury, Patrick Z., and Hess, Wayne P. Mon . "Surface Plasmon Coupling and Control Using Spherical Cap Structures". United States. doi:10.1021/acs.jpclett.7b00852.
@article{osti_1371972,
title = {Surface Plasmon Coupling and Control Using Spherical Cap Structures},
author = {Gong, Yu and Joly, Alan G. and Zhang, Xin and El-Khoury, Patrick Z. and Hess, Wayne P.},
abstractNote = {Propagating surface plasmons (PSPs) launched from a protruded silver spherical cap structure are investigated using photoemission electron microscopy (PEEM) and finite difference time domain (FDTD) calculations. Our combined experimental and theoretical findings reveal that PSP coupling efficiency is comparable to conventional etched-in plasmonic coupling structures. Additionally, plasmon propagation direction can be varied by a linear rotation of the driving laser polarization. A simple geometric model is proposed in which the plasmon direction selectivity is proportional to the projection of the linear laser polarization on the surface normal. An application for the spherical cap coupler as a gate device is proposed. Overall, our results indicate that protruded cap structures hold great promise as elements in emerging surface plasmon applications.},
doi = {10.1021/acs.jpclett.7b00852},
journal = {Journal of Physical Chemistry Letters},
number = 12,
volume = 8,
place = {United States},
year = {Mon Jun 05 00:00:00 EDT 2017},
month = {Mon Jun 05 00:00:00 EDT 2017}
}