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Strong Light Confinement and High Absorptionof Metal-Dielectric-Metal(MDM)Cylindrical Microcavities(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2017年02期
Page:
137-
Research Field:
·物理学·
Publishing date:

Info

Title:
Strong Light Confinement and High Absorptionof Metal-Dielectric-Metal(MDM)Cylindrical Microcavities
Author(s):
Heng Hang
Analysis and Testing Center,Nanjing Normal University,Nanjing 210023,China
Keywords:
microcavity; metal-semiconductor-metal; absorption
PACS:
O436.2
DOI:
10.3969/j.issn.1001-4616.2017.02.023
Abstract:
Plasmonic nanostructures concentrate optical field into extremely tiny volumes,which is useful for surface enhanced spectroscopy,bio-sensing and solar cells. We present the design of a cylindrical microcavity of high absorption and strong light confinement. The cylindrical microcavity is based on Au-dielectric-Au sandwiched structure. Numerically study shows that cylindrical microcavity can provide high electromagnetic average energy density and contain the most energy of the incoming light. The enhancement factor of average energy density G is up to 103～104-fold inside the cavity. The calculation results show that the G presents the regularities with the change of the thickness of the dielectric slab,dielectric constant and the radius of gold disk. At the normal incidence of electromagnetic radiation,the obtained reflection spectra operate in the range from 4.8 μm to 6 μm and the absorption efficiency C(C=1-Rmin)reaches 99% by optimizing the dielectric constant and the structure’s geometry parameters.

References:

[1] DU L P,ZHANG X J,MEI T,et al. Localized surface plasmons,surface plasmon polaritons and their coupling in 2D metallic array for SERS[J]. Opt Express,2010,18:1 959-1 965.
[2]MAIER S A,ATWATER H A. Plasmonics:localization and guiding of electromagnetic energy in metal/dielectric structures[J]. J Appl Phys,2005,98:011101-1-011101-10.
[3]KOGELBAUER I,HEINE E. Adaptation of soil physical measurement techniques for the delineation of mud and lakebed sediments at neusiedler see[J]. Sensors,2013,13:17 067-17 083.
[4]FEVILLET P C,TODOROV Y,STEED R. Extremely sub-wavelength THz metal-dielectric wire microcavities[J]. Opt Express,2012,20:29 121-29 130.
[5]TODOROV Y,TOSETTO L,TEISSIER J,et al. Optical properties of metal-dielectric-metal microcavities in the THz frequency range[J]. Opt Express,2010, 18:13 886-13 907.
[6]FEVILLET P C,TODOROW Y,VASANELLI A,et al. Strong near field enhancement in THz nano-antenna arrays[J]. Sientific reports,2013(3):299-308.
[7]WANG X D,YE Y H,ZHANG C. Tunable figure of merit for a negative-index metamaterial with a sandwich configuration[J]. Opt Lett,2009,34:3 568-3 570.
[8]CHEN K,WEN Q Y,ZHANG H B. Study on the broadband terahertz metamaterial absorber[J]. Electronic components and materials,2011,30:56-59.
[9]LANDY N I,SAJUYIGBE S. Perfect metamaterial absorber[J]. Physical Review Letters,2008,100:1 586-1 594.

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Last Update: 2017-06-30