Incident-angle-insensitive and polarization independent wavelength filter consisting of a metal nano-slit array

2015 Fiscal Year Final Research Report

• Project/Area Number: 25390099
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Optical engineering, Photon science
• Research Institution: Osaka Prefecture University
• Principal Investigator: Kikuta Hisao 大阪府立大学, 工学(系)研究科(研究院), 教授 (10214743)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 金属ナノスリット / 光学フィルタ / 光共鳴 / メタマテリアル / ナノインプリント

Outline of Final Research Achievements

Optical filter with a metal nano-slit array has been developed. Optical properties of the filter are insensitive to angle of incidence and polarization of light. The metal slit structure was designed from the basic parameters determined from the rigorous coupled-wave analysis. The filter was fabricated with techniques of acrylic-resin nano-imprint and electroless copper plating. The reflection spectrum of the fabricated filter has an absorption peak due to the optical resonance in the metal slits.
The periodic structure with a metal layer was developed for a highly-sensitive refractive-index sensor as an application of the metal nano-slits array. Moreover, a method of laser processing with polarized light was proposed for making metal slits.

Free Research Field

応用光学