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Title: Calculating nonlocal optical properties of structures with arbitrary shape.

Abstract

In a recent Letter [J. M. McMahon, S. K. Gray, and G. C. Schatz, Phys. Rev. Lett. 103, 097403 (2009)], we outlined a computational method to calculate the optical properties of structures with a spatially nonlocal dielectric function. In this paper, we detail the full method and verify it against analytical results for cylindrical nanowires. Then, as examples of our method, we calculate the optical properties of Au nanostructures in one, two, and three dimensions. We first calculate the transmission, reflection, and absorption spectra of thin films. Because of their simplicity, these systems demonstrate clearly the longitudinal (or volume) plasmons characteristic of nonlocal effects, which result in anomalous absorption and plasmon blueshifting. We then study the optical properties of spherical nanoparticles, which also exhibit such nonlocal effects. Finally, we compare the maximum and average electric field enhancements around nanowires of various shapes to local theory predictions. We demonstrate that when nonlocal effects are included, significant decreases in such properties can occur.

Authors:
; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); AFOSR/DARPA project; NSF MRSEC Northwestern Univ.
OSTI Identifier:
985139
Report Number(s):
ANL/CNM/JA-66107
Journal ID: 1098-0121; TRN: US201016%%1813
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Phys. Rev. B
Additional Journal Information:
Journal Volume: 82; Journal Issue: Jul. 16, 2010
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE; ABSORPTION; ABSORPTION SPECTRA; DIELECTRIC MATERIALS; DIMENSIONS; ELECTRIC FIELDS; NANOSTRUCTURES; OPTICAL PROPERTIES; PLASMONS; REFLECTION; SHAPE; THIN FILMS

Citation Formats

McMahon, J M, Gray, S K, Schatz, G C, and Northwestern Univ. Calculating nonlocal optical properties of structures with arbitrary shape.. United States: N. p., 2010. Web. doi:10.1103/PhysRevB.82.035423.
McMahon, J M, Gray, S K, Schatz, G C, & Northwestern Univ. Calculating nonlocal optical properties of structures with arbitrary shape.. United States. https://doi.org/10.1103/PhysRevB.82.035423
McMahon, J M, Gray, S K, Schatz, G C, and Northwestern Univ. 2010. "Calculating nonlocal optical properties of structures with arbitrary shape.". United States. https://doi.org/10.1103/PhysRevB.82.035423.
@article{osti_985139,
title = {Calculating nonlocal optical properties of structures with arbitrary shape.},
author = {McMahon, J M and Gray, S K and Schatz, G C and Northwestern Univ.},
abstractNote = {In a recent Letter [J. M. McMahon, S. K. Gray, and G. C. Schatz, Phys. Rev. Lett. 103, 097403 (2009)], we outlined a computational method to calculate the optical properties of structures with a spatially nonlocal dielectric function. In this paper, we detail the full method and verify it against analytical results for cylindrical nanowires. Then, as examples of our method, we calculate the optical properties of Au nanostructures in one, two, and three dimensions. We first calculate the transmission, reflection, and absorption spectra of thin films. Because of their simplicity, these systems demonstrate clearly the longitudinal (or volume) plasmons characteristic of nonlocal effects, which result in anomalous absorption and plasmon blueshifting. We then study the optical properties of spherical nanoparticles, which also exhibit such nonlocal effects. Finally, we compare the maximum and average electric field enhancements around nanowires of various shapes to local theory predictions. We demonstrate that when nonlocal effects are included, significant decreases in such properties can occur.},
doi = {10.1103/PhysRevB.82.035423},
url = {https://www.osti.gov/biblio/985139}, journal = {Phys. Rev. B},
number = Jul. 16, 2010,
volume = 82,
place = {United States},
year = {2010},
month = {7}
}