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Optical and Quantum Electronics
Erschienen in: Optical and Quantum Electronics 3/2015

01.03.2015

Effect of dielectric interface on the tight focusing properties of radially polarized annular multi Gaussian beams

verfasst von: M. Lavanya, K. Prabakaran, K. B. Rajesh, M. Udhayakumar

Erschienen in: Optical and Quantum Electronics | Ausgabe 3/2015

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Abstract

A super-length optical needle (44\(\lambda )\) of strong transversally polarized field with homogeneous intensity along the optical axis and sub-diffraction beam size (0.48\(\lambda )\) can be generated by focusing a radially polarized beam through a dielectric interface with an annular high numerical aperture (NA) lens. Moreover, the focal shifts induced by the mismatch of the refractive indices across the interface has been found. The dependence of focal shifts and spot size of the focused field on the probe depth and NA of the objective is also analyzed in detail by numerical calculations using vector diffraction theory. Such kind of non-diffracting optical needle may have applications in atom-optical experiments, such as with atom trap and atom switches.
Vorheriger Artikel Numerical study of unstable resonator in thin disk laser
Nächster Artikel Improved noise tolerance and spectral efficiency in RSOA based WDM-PON by using Miller signal

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Metadaten
Titel
Effect of dielectric interface on the tight focusing properties of radially polarized annular multi Gaussian beams
verfasst von
M. Lavanya
K. Prabakaran
K. B. Rajesh
M. Udhayakumar
Publikationsdatum
01.03.2015
Verlag
Springer US
Erschienen in
Optical and Quantum Electronics / Ausgabe 3/2015
Print ISSN: 0306-8919
Elektronische ISSN: 1572-817X
DOI
https://doi.org/10.1007/s11082-014-9934-y

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