Imaging properties of three dimensional aperture near-field scanning optical microscopy and optimized near-field fiber probe designs

Y.-F. Chau, T.-J. Yang, Din-ping Tsai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

14 Citations (Scopus)

Abstract

A series of finite difference time domain (FDTD) methods for obtaining more insight on the near-field distribution of subwavelength aperture and fiber probes are numerically investigated. The treatment of dispersive materials in a time-domain-dependent fashion is considered. Several significant factors are also considered successively, e.g., the near-field distribution of subwavelength aperture in an infinite aluminum plane with sample interactions, the characteristics between the near-field distribution and the depolarization phenomenon, different types of three-dimensional tip (noncoated and metal-coated) used to illuminate a photosensitive sample and the polarization of an incident electromagnetic field. Moreover, the FDTD designs of two types of improved probe are illustrated and a suggestion for fabricating an optimal probe is given. Our proposed structures will yield useful information and guidelines for designing high-performance near-field probes.
Original languageEnglish
Pages (from-to)8115-8125
Number of pages11
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume43
Issue number12
DOIs
Publication statusPublished - 1 Dec 2004
Externally publishedYes

Keywords

  • Depolarization
  • Dispersive materials
  • FDTD
  • Fiber probes
  • Near field
  • NSOM
  • Subwavelength

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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