Deterministic fabrication of nanostructures for plasmonic lens by focused ion beam

X. Luo, J. Sun, J.M. Ritchie, W. Chang, W. Wang

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Plasmonic lens is a key component in the development of sub-wavelength resolution optical system for bio-imaging and nanolithography applications. In order to develop a deterministic fabrication capability for nanostructures on plasmonic lens by using focused ion beam, this paper presents a highly robust and accurate surface topography model based on level set method. Sputtered atom distribution and angular dependence of sputter yield are calculated by Monte Carlo simulation programs SRIM/TRIM and TRIDYN, respectively. Redeposition effect is included in the physical model and successfully embedded into a topography simulation program by applying the level set method. The proposed model is validated and evaluated in the focused ion beam fabrication experiments. Simulation error of less than 7% is obtained. Two types of nanostructures for plasmonic lens were fabricated using the machining parameters approved by this simulation model. Simulation errors of 7 and 2 nm were found in a nanodots array and a spiral Bragg grating, respectively. The results clearly demonstrate the effectiveness of the modelling approach developed for deterministic fabrication of nanostructures.
Original languageEnglish
Pages (from-to)1003-1009
Number of pages7
JournalInternational Journal of Advanced Manufacturing Technology
Volume57
Issue number9-12
DOIs
Publication statusPublished - 1 Dec 2011

Keywords

  • focused ion beam
  • nanostructures
  • plasmonic lens
  • level set methods
  • surface topography

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