Contributo in atti di convegno, 2012, ENG, 10.1117/12.922572

Fabrication and test of polymeric microaxicons

Merola F. [ 1 ] ; Coppola S. [ 1,2 ] ; Vespini V. [ 1 ] ; Grilli S. [ 1 ] ; Ferraro P. [ 1 ] ; Balduzzi D. [ 3 ] ; Galli A. [ 3 ] Puglisi R. [ 3 ]

[ 1 ] Istituto Nazionale di Ottica (CNR-INO), Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy [ 2 ] Università degli Studi di Napoli "Federico II", Piazzale Tecchio 80, 80125 Napoli, Italy [ 3 ] Istituto Sperimentale Italiano "Lazzaro Spallanzani", Località La Quercia, 26027 Rivolta d'Adda

A digital holographic characterization of Bessel beams produced by polymeric microaxicons is reported. Both intensity and phase of the beam can be numerically reconstructed in whichever point starting from a single acquired hologram. Optical parameters such as the full width at half maximum, the focal length and the depth of focus of the axicon lens are experimentally measured. The Bessel beam exiting from the axicon, with a very large depth of focus with respect to that of a Gaussian beam, is successfully exploited for optical trapping of micrometric objects.

Conference on Micro-Optics Location, pp. 84280P–84280P, Brussels, BELGIUM, APR 16-19 2012

Keywords

Polymeric microaxicon, Bessel beams, optical trapping, Interferometric digital holography

CNR authors

Coppola Sara, Ferraro Pietro, Grilli Simonetta, Vespini Veronica, Merola Francesco

CNR institutes

ISASI – Istituto di Scienze Applicate e Sistemi Intelligenti "Eduardo Caianiello", INO – Istituto nazionale di ottica