Far-field measurements of vortex beams interacting with nanoholes

Xavier Zambrana-Puyalto; Xavier Vidal; Ivan Fernandez-Corbaton; Gabriel Molina-Terriza

doi:10.1038/srep22185

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

Macquarie University
Institut Fresnel
Karlsruhe Institute of Technology

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

3 Downloads (Pure)

Abstract

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, γ_m,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 γ_m,p ratio as compared to those obtained by Gaussian beams.

Original language	English
Article number	22185
Journal	Scientific Reports
Volume	6
DOIs	https://doi.org/10.1038/srep22185
Publication status	Published - 25 Feb 2016
Externally published	Yes

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title = "Far-field measurements of vortex beams interacting with nanoholes",

abstract = "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.",

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T1 - Far-field measurements of vortex beams interacting with nanoholes

AU - Zambrana-Puyalto, Xavier

AU - Vidal, Xavier

AU - Fernandez-Corbaton, Ivan

AU - Molina-Terriza, Gabriel

PY - 2016/2/25

Y1 - 2016/2/25

N2 - 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.

AB - 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.

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DO - 10.1038/srep22185

M3 - Article

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SN - 2045-2322

VL - 6

JO - Scientific Reports

JF - Scientific Reports

M1 - 22185

ER -

Far-field measurements of vortex beams interacting with nanoholes

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