Near-field light localization using subwavelength apertures incorporated with metamaterials

Date
2012-03-12
Advisor
Instructor
Source Title
Optics Communications
Print ISSN
0030-4018
Electronic ISSN
Publisher
Elsevier
Volume
285
Issue
16
Pages
3390 - 3396
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
Abstract

We report strong near-field electromagnetic localization by using subwavelength apertures and metamaterials that operate at microwave frequencies. We designed split ring resonators with distinct configurations in order to obtain extraordinary transmission results. Furthermore, we analyzed the field localization and focusing characteristics of the transmitted evanescent waves. The employed metamaterial configurations yielded an improvement on the transmission efficiency on the order of 27 dB and 50 dB for the deep subwavelength apertures. The metamaterial loaded apertures are considered as a total system that offered spot size conversion ratios as high as 7.12 and 9.11 for the corresponding metamaterial configurations. The proposed system is shown to intensify the electric fields of the source located in the near-field. It also narrows down the electromagnetic waves such that a full width at half maximum value of λ/29 is obtained.

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Other identifiers
Book Title
Keywords
Diffraction, grating and apertures, Electromagnetic wave transmission, Metamaterials, Resonators, Conversion ratio, Electromagnetic localization, Evanescent wave, Extraordinary transmission, Field localization, Light localization, Near-field, Split ring resonator, Spot sizes, Subwavelength apertures, Transmission efficiency, Electric fields, Electromagnetic wave transmission, Electromagnetic waves, Resonators, Metamaterials
Citation
Published Version (Please cite this version)