Polarization-dependent optical responses of Sb-type near-field optical disk structure

Tai Chi Chu, Ming Yaw Ng, Kuo Pin Chiu, Wei Chih Liu, Din Ping Tsai

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

1 Citation (Scopus)

Abstract

The near-field and far-field optical properties of Sb-type near-field optical disk structures with different polarized situations are studied by finite-difference time-domain (FDTD) method. Localized surface plasmon enhancements are found around rough surface of Sb layers for TM polarized, but no near-field enhancement is found in cases with TE polarized incident waves. Far-field readout contrast signals of both TE and TM polarized situations show the super-resolution capability, because evanescent signals of subwavelength recording marks are coupled to propagating waves by nanostrucrures (nano aperture or rough surface) in near-field active layer. Nevertheless, the contrast signals for TM illumination are higher than TE illumination due to localized surface plasmon enhancements. A simplified Fourier optics model is used to describe the relation between highly localized near-field distributions and enhanced resolution of far-field signals.

Original languageEnglish
Title of host publicationPlasmonics
Subtitle of host publicationNanoimaging, Nanofabrication, and their Applications II
DOIs
Publication statusPublished - Aug 2006
Externally publishedYes
EventPlasmonics: Nanoimaging, Nanofabrication, and their Applications II - San Diego, CA, United States
Duration: 16 Aug 200617 Aug 2006

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6324
ISSN (Print)0277-786X

Conference

ConferencePlasmonics: Nanoimaging, Nanofabrication, and their Applications II
CountryUnited States
CitySan Diego, CA
Period16/08/0617/08/06

Keywords

  • Diffraction limit
  • Finite-difference time-domain method
  • Fourier optics
  • High-density optical data storage
  • Localized surface plasmon
  • Near-field optical disk structure
  • Sb nanostrucrures

ASJC Scopus subject areas

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

Cite this