Wavelength-adaptable effective q-plates with passively tunable retardance.

Abstract:

:Wave retarders having spatially varying optical axes orientations, called q-plates are extremely efficient devices for converting spin to orbital angular momentum of light and for the generation of optical vortices. Most often, these plates are designed for a specific wavelength and have a homogeneous constant retardance. The present work provides a polarimetric approach for overcoming both these limitations. We theoretically propose and experimentally demonstrate q-plates with tunable retardance, employing a combination of only standard q-plates and waveplates. A clear prescription is provided for realizing wavelength indepedent q-plates for a desired retardance, with a potential for ultrafast switching. Apart from the potential commercial value of the proposed devices, our results may find applications in quantum communication protocols, astronomical coronography, angular momentum sorting and in schemes that leverage optical vortices and spin to orbital angular momentum conversion.

journal_name

Sci Rep

journal_title

Scientific reports

authors

B R,Kadiri G,Raghavan G

doi

10.1038/s41598-019-48163-8

subject

Has Abstract

pub_date

2019-08-15 00:00:00

pages

11911

issue

1

issn

2045-2322

pii

10.1038/s41598-019-48163-8

journal_volume

9

pub_type

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