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Title: Optical diffraction properties of multimicrogratings

This paper shows the results of optical diffraction properties of multimicrograting structures fabricated by e-beam lithography. Multimicrograting consist of arrays of hexagonally shaped cells containing periodic one-dimensional (1D) grating lines in different orientations and arrayed to form large area patterns. We analyzed the optical diffraction properties of multimicrogratings by studying the individual effects of the several periodic elements of multimicrogratings. The observed optical diffraction pattern is shown to be the combined effect of the periodic and non-periodic elements that define the multimicrogratings and the interaction between different elements. We measured the total transverse electric (TE) diffraction efficiency of multimicrogratings and found it to be 32.1%, which is closely related to the diffraction efficiency of 1D periodic grating lines of the same characteristics, measured to be 33.7%. Beam profiles of the optical diffraction patterns from multimicrogratings are captured with a CCD sensor technique. Interference fringes were observed under certain conditions formed by multimicrograting beams interfering with each other. Finally, these diffraction structures may find applications in sensing, nanometrology, and optical interconnects.
Authors:
 [1] ;  [2] ;  [1]
  1. Univ. of Virginia, Charlottesville, VA (United States). Dept. of Electrical and Computer Engineering
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Published Article
Journal Name:
Applied Optics
Additional Journal Information:
Journal Volume: 54; Journal Issue: 7; Journal ID: ISSN 1559-128X
Publisher:
Optical Society of America
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; diffraction grating; grating array; Fourier transform; microgratings; diffraction
OSTI Identifier:
1222281
Alternate Identifier(s):
OSTI ID: 1185603