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Special Section on Diffractive Optics and Nanophotonics

Simple phase optical elements for narrowing of a focal spot in high-numerical-aperture conditions

[+] Author Affiliations
Svetlana N. Khonina

Russian Academy of Sciences, Image Processing Systems Institute, Molodogvardeiskaya street 151, Samara 443001, Russia

Opt. Eng. 52(9), 091711 (Mar 07, 2013). doi:10.1117/1.OE.52.9.091711
History: Received November 23, 2012; Revised February 7, 2013; Accepted February 19, 2013
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Abstract.  It is shown that a decrease in the size of the focal spot produced by a high numerical aperture focusing system comes as the result of the spatial redistribution of different electric field components in the focal region. The focal distribution of electric field components can be controlled using vortex or binary phase diffractive elements. Situations for differently polarized incident laser beams are discussed and illustrated.

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© 2013 Society of Photo-Optical Instrumentation Engineers

Citation

Svetlana N. Khonina
"Simple phase optical elements for narrowing of a focal spot in high-numerical-aperture conditions", Opt. Eng. 52(9), 091711 (Mar 07, 2013). ; http://dx.doi.org/10.1117/1.OE.52.9.091711


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