Title

Axial Superresolution Of Focused Radially Polarized Light Using Diffractive Optical Elements

Keywords

Diffractive optical element; Pupil filter; Radial polarization; Superresolution

Abstract

Particle swarm optimization (PSO) was used to design binary phase- and amplitude diffractive optical elements (DOEs) that axially superresolve a tightly focused radially polarized beam. The Pareto front was generated for a fitness-value space that describes the superresolution that can be achieved with the DOEs and radially polarized light versus an allowed upper bound in side lobe intensity. Fitness values for designs obtained via the PSO-, simplex-, and simulated-annealing methods are compared to show that PSO yields globally optimized solutions. Performance of binary phase/amplitude DOEs with different numbers of zones is compared. Binary amplitude DOEs give slightly better superresolution, whereas binary phase DOEs offer the advantage of higher power efficiency. The potential of using DOEs for 4Pi microscopy to further reduce the side lobes and achieve better superresolution is discussed. © 2013 Elsevier B.V.

Publication Date

1-1-2014

Publication Title

Optics Communications

Volume

315

Number of Pages

176-182

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.optcom.2013.11.009

Socpus ID

84888874060 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84888874060

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