Surface plasmon effects on the far-field signals of AgOx-type super resolution near-field structure

Wei Chih Liu; Ming Yaw Ng; Din Ping Tsai

doi:10.1143/JJAP.43.4713

Surface plasmon effects on the far-field signals of AgO_x-type super resolution near-field structure

Wei Chih Liu^*, Ming Yaw Ng, Din Ping Tsai

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

A super-resolution near-field structure (Super-RENS) of AgO_x type could perform the task of high-density near-field optical recording in a more feasible way. To further explore the optical resolution and controllability of super-RENS disks, the near-field and far-field optical properties of the AgO_x-type super-RENS embedded with random silver nanoparticles and nano cavities of different densities were studied using finite-difference time-domain simulations. The random nanostructures yielded super-resolution capability, but the surface plasmon effects generated by the random metallic nanoparticles significantly enhanced the far-field signals. A simplified Fourier optical theory was proposed to understand the relationship between the enhanced near field of random nanostructures and the super-resolution capability in the far field.

Original language	English
Pages (from-to)	4713-4717
Number of pages	5
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	43
Issue number	7 B
DOIs	https://doi.org/10.1143/JJAP.43.4713
Publication status	Published - 2004 Jul

Keywords

Finite-difference time-domain method
Localized surface plasmon
Metallic nanoparticles
Super-resolution near-field structure

ASJC Scopus subject areas

General Engineering
General Physics and Astronomy

Access to Document

10.1143/JJAP.43.4713

Cite this

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abstract = "A super-resolution near-field structure (Super-RENS) of AgOx type could perform the task of high-density near-field optical recording in a more feasible way. To further explore the optical resolution and controllability of super-RENS disks, the near-field and far-field optical properties of the AgOx-type super-RENS embedded with random silver nanoparticles and nano cavities of different densities were studied using finite-difference time-domain simulations. The random nanostructures yielded super-resolution capability, but the surface plasmon effects generated by the random metallic nanoparticles significantly enhanced the far-field signals. A simplified Fourier optical theory was proposed to understand the relationship between the enhanced near field of random nanostructures and the super-resolution capability in the far field.",

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