Journal
JOURNAL OF NANOPHOTONICS
Volume 7, Issue -, Pages -Publisher
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
DOI: 10.1117/1.JNP.7.073080
Keywords
Moire effect; unmatched medium; visibility
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Funding
- National Natural Science Foundation of China [11104063, 11204068]
- Doctor Funding Project of Henan Polytechnic University [B2011-082, B2013-049]
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The visibility of Moire fringes is a major feature for their application in optical metrology. With the help of surface plasmon polariton (SPP) waves excited for a metal layer whose permittivity match with that of its dielectric partner, the visibility of Moire fringes is improved. For a dielectric-metal-dielectric sandwich structure between two subwavelength gratings with the optimum thicknesses of the layers but not appropriately matched permittivity, we found that it is easy to achieve a remarkable enhancement (visibility up to 0.88) of the Moire fringes facilitated by the excitation of SPP waves. (c) 2013 Society of Photo-Optical Instrumentation Engineers (SPIE)
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