A High-Efficiency Multispectral Filter Based on Plasmonic Hybridization between Two Cascaded Ultrathin Nanogratings
Overcoming the disadvantages of low transmission and broad peak bandwidth of previously reported plasmonic color filters, a high-efficiency multispectral plasmonic color filter is theoretically proposed with two cascaded ultrathin metallic nanogratings separated by two heterogeneous dielectric layer...
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doaj-dc2b1549b00940688ff86d33d553aabe2020-11-24T22:01:12ZengMDPI AGMolecules1420-30492019-05-012411203810.3390/molecules24112038molecules24112038A High-Efficiency Multispectral Filter Based on Plasmonic Hybridization between Two Cascaded Ultrathin NanogratingsBo Zhao0Zhenfen Huang1Jianjun Yang2Lei Zhang3Rajagopal S. Joshya4Chunlei Guo5Department of Electronic Information and Physics, Changzhi University, Changzhi 046011, Shanxi, ChinaDepartment of Electronic Information and Physics, Changzhi University, Changzhi 046011, Shanxi, ChinaThe Guo China-US Photonics Laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, Jilin, ChinaDepartment of Electronic Information and Physics, Changzhi University, Changzhi 046011, Shanxi, ChinaThe Guo China-US Photonics Laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, Jilin, ChinaThe Guo China-US Photonics Laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, Jilin, ChinaOvercoming the disadvantages of low transmission and broad peak bandwidth of previously reported plasmonic color filters, a high-efficiency multispectral plasmonic color filter is theoretically proposed with two cascaded ultrathin metallic nanogratings separated by two heterogeneous dielectric layers, and its optical properties are theoretically investigated using the finite-difference time-domain method. The transmission spectrum presents three near-unity peak bands accompanied with three near-null dip bands adjacent around them. Both transmission efficiencies of above 90% and ultranarrow peak bandwidth of 20 nm are achieved in the visible regime. The peak band positions can be flexibly tailored by varying the structural parameters. The filter selects the visible color with high signal noise ratio at the peak bands. The outstanding spectral properties of this filter indicate significant improvement for the high-accuracy color filtering and multispectral imaging applications. The simulated near-field electromagnetic distributions suggest that the excitation of the hybrid antisymmetric surface plasmon polariton (SPP) leaky mode and metal-insulator-metal waveguide modes are responsible for the peak transmission bands, while the formation of the hybrid SPP bound modes confined on the bottom nanograting makes the dip transmission bands, all of which are the consequence of the plasmonic hybridization between the two neighboring metallic nanogratings.https://www.mdpi.com/1420-3049/24/11/2038surface plasmon polariton (SPP)metal-insulator-metal (MIM) structuresleaky and bound modewaveguide modemultispectral filterplasmonic hybridization |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Bo Zhao Zhenfen Huang Jianjun Yang Lei Zhang Rajagopal S. Joshya Chunlei Guo |
spellingShingle |
Bo Zhao Zhenfen Huang Jianjun Yang Lei Zhang Rajagopal S. Joshya Chunlei Guo A High-Efficiency Multispectral Filter Based on Plasmonic Hybridization between Two Cascaded Ultrathin Nanogratings Molecules surface plasmon polariton (SPP) metal-insulator-metal (MIM) structures leaky and bound mode waveguide mode multispectral filter plasmonic hybridization |
author_facet |
Bo Zhao Zhenfen Huang Jianjun Yang Lei Zhang Rajagopal S. Joshya Chunlei Guo |
author_sort |
Bo Zhao |
title |
A High-Efficiency Multispectral Filter Based on Plasmonic Hybridization between Two Cascaded Ultrathin Nanogratings |
title_short |
A High-Efficiency Multispectral Filter Based on Plasmonic Hybridization between Two Cascaded Ultrathin Nanogratings |
title_full |
A High-Efficiency Multispectral Filter Based on Plasmonic Hybridization between Two Cascaded Ultrathin Nanogratings |
title_fullStr |
A High-Efficiency Multispectral Filter Based on Plasmonic Hybridization between Two Cascaded Ultrathin Nanogratings |
title_full_unstemmed |
A High-Efficiency Multispectral Filter Based on Plasmonic Hybridization between Two Cascaded Ultrathin Nanogratings |
title_sort |
high-efficiency multispectral filter based on plasmonic hybridization between two cascaded ultrathin nanogratings |
publisher |
MDPI AG |
series |
Molecules |
issn |
1420-3049 |
publishDate |
2019-05-01 |
description |
Overcoming the disadvantages of low transmission and broad peak bandwidth of previously reported plasmonic color filters, a high-efficiency multispectral plasmonic color filter is theoretically proposed with two cascaded ultrathin metallic nanogratings separated by two heterogeneous dielectric layers, and its optical properties are theoretically investigated using the finite-difference time-domain method. The transmission spectrum presents three near-unity peak bands accompanied with three near-null dip bands adjacent around them. Both transmission efficiencies of above 90% and ultranarrow peak bandwidth of 20 nm are achieved in the visible regime. The peak band positions can be flexibly tailored by varying the structural parameters. The filter selects the visible color with high signal noise ratio at the peak bands. The outstanding spectral properties of this filter indicate significant improvement for the high-accuracy color filtering and multispectral imaging applications. The simulated near-field electromagnetic distributions suggest that the excitation of the hybrid antisymmetric surface plasmon polariton (SPP) leaky mode and metal-insulator-metal waveguide modes are responsible for the peak transmission bands, while the formation of the hybrid SPP bound modes confined on the bottom nanograting makes the dip transmission bands, all of which are the consequence of the plasmonic hybridization between the two neighboring metallic nanogratings. |
topic |
surface plasmon polariton (SPP) metal-insulator-metal (MIM) structures leaky and bound mode waveguide mode multispectral filter plasmonic hybridization |
url |
https://www.mdpi.com/1420-3049/24/11/2038 |
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