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Near-Field Enhancement Through a Single Subwavelength Aperture with Gaps Inside
- Source :
- Plasmonics. 6:149-154
- Publication Year :
- 2010
- Publisher :
- Springer Science and Business Media LLC, 2010.
-
Abstract
- Structured subwavelength apertures have been studied widely to enhance the transmission or obtain super resolution, such as bull’s eye hole, H-shaped aperture, and bowtie aperture. In this letter, we present another structured aperture with two gaps inside, which can also lead to near-field enhancement. And the resonance wavelength can be tuned by the geometric parameters of the gaps. The enhancement of this gap-aperture depends strongly on the polarization of the incident wave. Only the polarization perpendicular to the connecting line of the two gaps can realize the enhancement. We attribute the near-field enhancement of this structured aperture to the resonance excitation of the localized surface plasmon. We combine the tooth-aperture and our gap-aperture together and this special aperture can achieve stronger enhancement and super resolution simultaneously.
- Subjects :
- Physics
business.industry
Aperture
Astrophysics::Instrumentation and Methods for Astrophysics
Biophysics
Extraordinary optical transmission
Near and far field
Polarization (waves)
Biochemistry
Superresolution
Optics
Perpendicular
Physics::Accelerator Physics
Optoelectronics
Resonance wavelength
business
Biotechnology
Localized surface plasmon
Subjects
Details
- ISSN :
- 15571963 and 15571955
- Volume :
- 6
- Database :
- OpenAIRE
- Journal :
- Plasmonics
- Accession number :
- edsair.doi...........c4b31455ee54a58b1f8bed382226351e
- Full Text :
- https://doi.org/10.1007/s11468-010-9180-5