Far-field measurements of vortex beams interacting with nanoholes

Xavier Zambrana-Puyalto*, Xavier Vidal, Ivan Fernandez-Corbaton, Gabriel Molina-Terriza

*Corresponding author for this work

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We measure the far-field intensity of vortex beams going through nanoholes. The process is analyzed in terms of helicity and total angular momentum. It is seen that the total angular momentum is preserved in the process, and helicity is not. We compute the ratio between the two transmitted helicity components, γm,p. We observe that this ratio is highly dependent on the helicity (p) and the angular momentum (m) of the incident vortex beam in consideration. Due to the mirror symmetry of the nanoholes, we are able to relate the transmission properties of vortex beams with a certain helicity and angular momentum, with the ones with opposite helicity and angular momentum. Interestingly, vortex beams enhance the γm,p ratio as compared to those obtained by Gaussian beams.

Original languageEnglish
Article number22185
Pages (from-to)1-10
Number of pages10
JournalScientific Reports
Publication statusPublished - 25 Feb 2016

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Copyright the Author(s) 2016. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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