Dephasing of electromagnetic fields in scattering from an isolated slit in a gold film

Jeffrey M. McMahon, Stephen K. Gray, George C Schatz

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Herein we perform three-dimensional finite-difference time-domain calculations on an isolated micron size slit in a thin gold film to study the behavior of confined electromagnetic fields for TM, TE, and circular incident polarizations. It is found that the electric and magnetic fields exhibit well defined standing wave patterns inside the slit. Moreover, the electric and magnetic fields are seen to be out of phase, and the power flow through the slit is governed mainly by the magnetic field for TM polarization and the electric field for TE and circular polarizations. To understand these results a theoretical modal expansion of the fields in the presence of the slit is done. It is found that the standing wave patterns and dephasing can be attributed to a superposition of propagating and evanescent waveguide modes.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume7033
DOIs
Publication statusPublished - 2008
EventPlasmonics: Nanoimaging, Nanofabrication, and Their Applications IV - San Diego, CA, United States
Duration: Aug 10 2008Aug 14 2008

Other

OtherPlasmonics: Nanoimaging, Nanofabrication, and Their Applications IV
CountryUnited States
CitySan Diego, CA
Period8/10/088/14/08

Fingerprint

Gold
Electromagnetic fields
Electromagnetic Fields
slits
Electric Field
electromagnetic fields
Magnetic Field
Electric fields
Standing Wave
Scattering
gold
Magnetic fields
Polarization
scattering
standing waves
Circular Polarization
electric fields
Power Flow
Circular polarization
polarization

Keywords

  • Dephasing
  • Electromagnetic fields
  • FDTD
  • Metal slits
  • Modal method
  • Waveguide modes

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

McMahon, J. M., Gray, S. K., & Schatz, G. C. (2008). Dephasing of electromagnetic fields in scattering from an isolated slit in a gold film. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 7033). [703311] https://doi.org/10.1117/12.790647

Dephasing of electromagnetic fields in scattering from an isolated slit in a gold film. / McMahon, Jeffrey M.; Gray, Stephen K.; Schatz, George C.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7033 2008. 703311.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

McMahon, JM, Gray, SK & Schatz, GC 2008, Dephasing of electromagnetic fields in scattering from an isolated slit in a gold film. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 7033, 703311, Plasmonics: Nanoimaging, Nanofabrication, and Their Applications IV, San Diego, CA, United States, 8/10/08. https://doi.org/10.1117/12.790647
McMahon JM, Gray SK, Schatz GC. Dephasing of electromagnetic fields in scattering from an isolated slit in a gold film. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7033. 2008. 703311 https://doi.org/10.1117/12.790647
McMahon, Jeffrey M. ; Gray, Stephen K. ; Schatz, George C. / Dephasing of electromagnetic fields in scattering from an isolated slit in a gold film. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7033 2008.
@inproceedings{7a774626e0404fbf88436253ff5ac1d8,
title = "Dephasing of electromagnetic fields in scattering from an isolated slit in a gold film",
abstract = "Herein we perform three-dimensional finite-difference time-domain calculations on an isolated micron size slit in a thin gold film to study the behavior of confined electromagnetic fields for TM, TE, and circular incident polarizations. It is found that the electric and magnetic fields exhibit well defined standing wave patterns inside the slit. Moreover, the electric and magnetic fields are seen to be out of phase, and the power flow through the slit is governed mainly by the magnetic field for TM polarization and the electric field for TE and circular polarizations. To understand these results a theoretical modal expansion of the fields in the presence of the slit is done. It is found that the standing wave patterns and dephasing can be attributed to a superposition of propagating and evanescent waveguide modes.",
keywords = "Dephasing, Electromagnetic fields, FDTD, Metal slits, Modal method, Waveguide modes",
author = "McMahon, {Jeffrey M.} and Gray, {Stephen K.} and Schatz, {George C}",
year = "2008",
doi = "10.1117/12.790647",
language = "English",
isbn = "9780819472533",
volume = "7033",
booktitle = "Proceedings of SPIE - The International Society for Optical Engineering",

}

TY - GEN

T1 - Dephasing of electromagnetic fields in scattering from an isolated slit in a gold film

AU - McMahon, Jeffrey M.

AU - Gray, Stephen K.

AU - Schatz, George C

PY - 2008

Y1 - 2008

N2 - Herein we perform three-dimensional finite-difference time-domain calculations on an isolated micron size slit in a thin gold film to study the behavior of confined electromagnetic fields for TM, TE, and circular incident polarizations. It is found that the electric and magnetic fields exhibit well defined standing wave patterns inside the slit. Moreover, the electric and magnetic fields are seen to be out of phase, and the power flow through the slit is governed mainly by the magnetic field for TM polarization and the electric field for TE and circular polarizations. To understand these results a theoretical modal expansion of the fields in the presence of the slit is done. It is found that the standing wave patterns and dephasing can be attributed to a superposition of propagating and evanescent waveguide modes.

AB - Herein we perform three-dimensional finite-difference time-domain calculations on an isolated micron size slit in a thin gold film to study the behavior of confined electromagnetic fields for TM, TE, and circular incident polarizations. It is found that the electric and magnetic fields exhibit well defined standing wave patterns inside the slit. Moreover, the electric and magnetic fields are seen to be out of phase, and the power flow through the slit is governed mainly by the magnetic field for TM polarization and the electric field for TE and circular polarizations. To understand these results a theoretical modal expansion of the fields in the presence of the slit is done. It is found that the standing wave patterns and dephasing can be attributed to a superposition of propagating and evanescent waveguide modes.

KW - Dephasing

KW - Electromagnetic fields

KW - FDTD

KW - Metal slits

KW - Modal method

KW - Waveguide modes

UR - http://www.scopus.com/inward/record.url?scp=56249126004&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=56249126004&partnerID=8YFLogxK

U2 - 10.1117/12.790647

DO - 10.1117/12.790647

M3 - Conference contribution

SN - 9780819472533

VL - 7033

BT - Proceedings of SPIE - The International Society for Optical Engineering

ER -