Fabry-Perot cavity resonance enabling highly polarization-sensitive double-layer gold grating
- Korea Research Institute of Standards and Science, Daejeon (Korea); Hanyang Univ., Seoul (Korea)
- Korea Research Institute of Standards and Science, Daejeon (Korea); Indiana Univ.-Purdue Univ. Indianapolis, Indianapolis, IN (United States)
- Korea Research Institute of Standards and Science, Daejeon (Korea)
- Univ. of South Florida, Tampa, FL (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Indiana Univ.-Purdue Univ. Indianapolis, Indianapolis, IN (United States); North Carolina State Univ., Raleigh, NC (United States)
- Hanyang Univ., Seoul (Korea)
- Air Force Research Lab., WPAFB, OH (United States)
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°). Furthermore, 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.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- National Research Foundation of Korea (NRF); Alfred P. Sloan Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES); Air Force Research Laboratory (AFRL)
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1487138
- Journal Information:
- Scientific Reports, Vol. 8, Issue 1; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Resonant Dual‐Grating Metamembranes Supporting Spectrally Narrow Bound States in the Continuum
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journal | July 2019 |
Dichroic Optical Diode Transmission in Two Dislocated Parallel Metallic Gratings
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journal | December 2018 |
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