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Proceedings Paper

Nanoarrays for the generation of complex optical wave-forms
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Paper Abstract

Light beams with unusual forms of wavefront offer a host of useful features to extend the repertoire of those developing new optical techniques. Complex, non-uniform wavefront structures offer a wide range of optomechanical applications, from microparticle rotation, traction and sorting, through to contactless microfluidic motors. Beams combining transverse nodal structures with orbital angular momentum, or vector beams with novel polarization profiles, also present new opportunities for imaging and the optical transmission of information, including quantum entanglement effects. Whilst there are numerous well-proven methods for generating light with complex wave-forms, most current methods work on the basis of modifying a conventional Hermite-Gaussian beam, by passage through suitably tailored optical elements. It has generally been considered impossible to directly generate wave-front structured beams either by spontaneous or stimulated emission from individual atoms, ions or molecules. However, newly emerged principles have shown that emitter arrays, cast in an appropriately specified geometry, can overcome the obstacles: one possibility is a construct based on the electronic excitation of nanofabricated circular arrays. Recent experimental work has extended this concept to a phase-imprinted ring of apertures holographically encoded in a diffractive mask, generated by a programmed spatial light modulator. These latest advances are potentially paving the way for creating new sources of structured light.

Paper Details

Date Published: 12 September 2014
PDF: 6 pages
Proc. SPIE 9160, Metamaterials: Fundamentals and Applications 2014, 91601L (12 September 2014); doi: 10.1117/12.2060714
Show Author Affiliations
David L. Andrews, Univ. of East Anglia (United Kingdom)
Mathew D. Williams, Univ. of East Anglia (United Kingdom)
David S. Bradshaw, Univ. of East Anglia (United Kingdom)
Ruifeng Lui, Univ. of Glasgow (United Kingdom)
David B. Phillips, Univ. of Glasgow (United Kingdom)
Sonja Franke-Arnold, Univ. of Glasgow (United Kingdom)
Miles J. Padgett, Univ. of Glasgow (United Kingdom)

Published in SPIE Proceedings Vol. 9160:
Metamaterials: Fundamentals and Applications 2014
Nader Engheta; Mikhail A. Noginov; Nikolay I. Zheludev, Editor(s)

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