Far-field measurements of vortex beams interacting with nanoholes

被引：16

作者：

Zambrana-Puyalto, Xavier ^{[1
,2
,3
]}

Vidal, Xavier ^{[1
]}

Fernandez-Corbaton, Ivan ^{[4
]}

Molina-Terriza, Gabriel ^{[1
,2
]}

机构：

[1] Macquarie Univ, Dept Phys & Astron, N Ryde, NSW 2109, Australia

[2] Macquarie Univ, ARC Ctr Engn Quantum Syst, N Ryde, NSW 2109, Australia

[3] Aix Marseille Univ, CNRS, Inst Fresnel UMR 7249, Cent Marseille, F-13013 Marseille, France

[4] Karlsruhe Inst Technol, Inst Nanotechnol, D-76021 Karlsruhe, Germany

来源：

SCIENTIFIC REPORTS | 2016年 / 6卷

基金：

澳大利亚研究理事会;

关键词：

ORBITAL ANGULAR-MOMENTUM; SURFACE-PLASMON RESONANCE; OPTICAL TWEEZERS; LIGHT; TRANSMISSION; CONVERSION; SPIN;

D O I：

10.1038/srep22185

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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, gamma(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 gamma(m,p) ratio as compared to those obtained by Gaussian beams.

引用

页数：10

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