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Enhancing extraordinary transmission of light through a metallic nanoslit with a nanocavity antenna
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Cui, Y. X. (författare)
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- He, Sailing (författare)
- KTH,Elektroteknisk teori och konstruktion
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(creator_code:org_t)
- 2009
- Engelska.
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Ingår i: Optics Letters. - 0146-9592 .- 1539-4794. ; 34:1, s. 16-18
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The extraordinary transmission of light through a vertical nanoslit in a metal film is enhanced by introducing a nanocavity antenna formed by a nearby metallic nanostrip over the slit opening. For a fixed wavelength, the width of the metallic nanostrip should be chosen to make the horizontal metal-insulator-metal waveguide of finite length resonant as a Fabry-Perot cavity. When such a cavity antenna is used to enhance the transmission through a nonresonant nanoslit, the slit should be opened at a position with a maximal magnetic field in the horizontal resonant cavity. It is shown that an optimized cavity antenna can enhance greatly the transmission of light through a nonresonant nanoslit (by about 20 times) or a resonant nanoslit (by 124%). Such a transmission enhancement with a nanocavity antenna is studied for the first time, and the physical mechanism is explained.
Nyckelord
- emission
- films
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)