Mapping of surface plasmon polaritons on nanostructured thin film disks using cathodoluminescence imaging

Anil Kumar, Kin Hung Fung, Nicholas X. Fang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

In this paper we report investigations on mapping of surface plasmon polaritons (SPPs) on nanostructured thin film disks using electron-beam excitation. Square and circular disks with sub-micron characteristic dimensions were patterned using electron-beam lithography. Two-dimensional confinement of SPPs resulted into standing wave patterns that were imaged using cathodoluminescence spectroscopy. Several modes of the disks were identified and were found to be dependent on disk geometry as well as position of the electron beam. Detailed analysis of specific modes is provided using panchromatic imaging of the disks. SPP wavelengths as small as 100 nm are predicted from the dispersion curves of 15 nm thick Ag films. Extremely small mode volumes on disks as small as 65 nm are mapped. Our investigations enhance understanding of light-matter interaction at nanoscale with potential applications in various areas including photonics, optoelectronics, chemical and biological sensing, and next generation optical communication.
Original languageEnglish
Title of host publicationPhotonic and Phononic Properties of Engineered Nanostructures
Volume7946
DOIs
Publication statusPublished - 13 May 2011
Externally publishedYes
EventPhotonic and Phononic Properties of Engineered Nanostructures - San Francisco, CA, United States
Duration: 24 Jan 201127 Jan 2011

Conference

ConferencePhotonic and Phononic Properties of Engineered Nanostructures
CountryUnited States
CitySan Francisco, CA
Period24/01/1127/01/11

Keywords

  • Cathodoluminescence
  • electron beam
  • electron beam lithography
  • imaging
  • silver
  • spectroscopy

ASJC Scopus subject areas

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

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