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Fabry-Perot cavity resonance enabling highly polarization-sensitive double-layer gold grating.
Hwang, Jehwan; Oh, Boram; Kim, Yeongho; Silva, Sinhara; Kim, Jun Oh; Czaplewski, David A; Ryu, Jong Eun; Kim, Eun Kyu; Urbas, Augustine; Zhou, Jiangfeng; Ku, Zahyun; Lee, Sang Jun.
Afiliación
  • Hwang J; Division of Industrial Metrology, Korea Research Institute of Standards and Science, Daejeon, 34113, Korea.
  • Oh B; Department of Physics, Hanyang University, Seoul, 04763, Korea.
  • Kim Y; Division of Industrial Metrology, Korea Research Institute of Standards and Science, Daejeon, 34113, Korea.
  • Silva S; Department of Mechanical Engineering, Indiana University-Purdue University Indianapolis, Indianapolis, IN, 46202, USA.
  • Kim JO; Division of Industrial Metrology, Korea Research Institute of Standards and Science, Daejeon, 34113, Korea.
  • Czaplewski DA; Department of Physics, University of South Florida, Tampa, FL, 33620, USA.
  • Ryu JE; Division of Industrial Metrology, Korea Research Institute of Standards and Science, Daejeon, 34113, Korea.
  • Kim EK; Center for Nanoscale Materials, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, IL, 60439, USA.
  • Urbas A; Department of Mechanical Engineering, Indiana University-Purdue University Indianapolis, Indianapolis, IN, 46202, USA.
  • Zhou J; Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC, 27695, USA.
  • Ku Z; Department of Physics, Hanyang University, Seoul, 04763, Korea.
  • Lee SJ; Materials and Manufacturing directorate, Air Force Research Laboratory, WPAFB, OH, 45433, USA.
Sci Rep ; 8(1): 14787, 2018 Oct 03.
Article en En | MEDLINE | ID: mdl-30283011
We present experimental and theoretical investigations on the polarization properties of a single- and a double-layer gold (Au) grating, serving as a wire grid polarizer. Two layers of Au gratings form a cavity that effectively modulates the transmission and reflection of linearly polarized light. Theoretical calculations based on a transfer matrix method reveals that the double-layer Au grating structure creates an optical cavity exhibiting Fabry-Perot (FP) resonance modes. As compared to a single-layer grating, the FP cavity resonance modes of the double-layer grating significantly enhance the transmission of the transverse magnetic (TM) mode, while suppressing the transmission of the transverse electric (TE) mode. As a result, the extinction ratio of TM to TE transmission for the double-layer grating structure is improved by a factor of approximately 8 in the mid-wave infrared region of 3.4-6 µm. Furthermore, excellent infrared imagery is obtained with over a 600% increase in the ratio of the TM-output voltage (Vθ = 0°) to TE-output voltage (Vθ = 90°). This double-layer Au grating structure has great potential for use in polarimetric imaging applications due to its superior ability to resolve linear polarization signatures.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Diagnostic_studies Idioma: En Revista: Sci Rep Año: 2018 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Diagnostic_studies Idioma: En Revista: Sci Rep Año: 2018 Tipo del documento: Article Pais de publicación: Reino Unido