Light Funneling Profile During Enhanced Transmission Through a Subwavelength Metallic Slit

The funneling profile of enhanced light transmission through a subwavelength slit in a perfect electric conductor is studied with finite-difference time-domain simulation. From the wave-charge interaction dynamics, it is found that the EM wave energy is funneled while charges are accumulated at the...

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Published inPlasmonics (Norwell, Mass.) Vol. 13; no. 6; pp. 2249 - 2254
Main Authors Li, Jing-Wei, Hong, Jian-Shiung, Chou, Wei-Ting, Huang, Ding-Jie, Chen, Kuan-Ren
Format Journal Article
LanguageEnglish
Published New York Springer US 01.12.2018
Springer Nature B.V
Subjects
Biochemistry
Biological and Medical Physics
Biophysics
Biotechnology
Chemistry
Chemistry and Materials Science
Conductors
Electric conductors
Finite difference time domain method
Flux density
Light transmission
Nanotechnology
Wave power
Light funneling
Subwavelength slit
Fabry-Pérot resonance
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Summary:The funneling profile of enhanced light transmission through a subwavelength slit in a perfect electric conductor is studied with finite-difference time-domain simulation. From the wave-charge interaction dynamics, it is found that the EM wave energy is funneled while charges are accumulated at the edges of the slit. The Poynting vector indicates a boundary within which the wave energy flows toward the slit. Therefore, a funneling profile is defined by this boundary; as the slit width and thickness determine the transmitted energy density, the size of the funneling area is a relevant quantity of major concern.
ISSN:1557-1955
1557-1963
DOI:10.1007/s11468-018-0745-z