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Determination of beam incidence conditions based on the analysis of laser interference patterns

  • Dapeng Wang
    ,
  • Zuobin Wang
    ,
  • Yong Yue
    ,
  • Juncai Yu
    ,
  • Chunlei Tan
    ,
  • Dayou Li
  • Changchun University of Science and Technology
    ,
  • Xi'an Jiaotong-Liverpool University
    ,
  • Tampere University
Research Output: Contribution to journal Article Peer-review

Open access

Abstract

Beam incidence conditions in the formation of two-, three- and four-beam laser interference patterns are presented and studied in this paper. In a laser interference lithography (LIL) process, it is of importance to determine and control beam incidence conditions based on the analysis of laser interference patterns for system calibration as any slight change of incident angles or intensities of beams will introduce significant variations of periods and contrasts of interference patterns. In this work, interference patterns were captured by a He-Ne laser interference system under different incidence conditions, the pattern period measurement was achieved by cross-correlation with, and the pattern contrast was calculated by image processing. Subsequently, the incident angles and intensities of beams were determined based on the analysis of spatial distributions of interfering beams. As a consequence, the relationship between the beam incidence conditions and interference patterns is revealed. The proposed method is useful for the calibration of LIL processes and for reverse engineering applications.

Publication Information

Output type

Research Output: Contribution to journal Article Peer-review

Original language

English

Pages from-to (Number of pages)

Pages 2902-2907

Journal (Volume, Issue Number)

Optik (Volume 126, Issue 21)

Publication milestones

  • Accepted/In press - 04/07/2015
  • Published - 17/07/2015

Publication status

Published - 17/07/2015

ISSN

0030-4026

External Publication IDs

  • handle.net: 10547/622029
  • Scopus: 84942373998

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