Generation of an axially asymmetric bessel-like beam from a metallic subwavelength aperture

Date
2009
Advisor
Instructor
Source Title
Physical Review Letters
Print ISSN
0031-9007
Electronic ISSN
1079-7114
Publisher
American Physical Society
Volume
102
Issue
14
Pages
143901-4 - 143901-1
Language
English
Type
Article
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Abstract

An electromagnetic nondiffractive Bessel-like beam from a subwavelength aperture is generated by placing a metallic circular gratinglike structure in front of the aperture. When the incident wave is linearly polarized, the beam is axially asymmetric. The beam possesses fluctuating, but approximately uniform, intensity distribution along its longitudinal axis. The full width at half maximum of the beam remains less than two wavelengths over nearly ten wavelengths. Our experimental results are in good agreement with the simulation results and analytical results. © 2009 The American Physical Society.

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Published Version (Please cite this version)