Cited by 411Orbital Angular Momentum in OpticsQuantum Information and CryptographyQuantum Mechanics and Applications

Quantum Information Transfer from Spin to Orbital Angular Momentum of Photons

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Nagali, Eleonora, Sciarrino, Fabio, De Martini, Francesco, Marrucci, Lorenzo, Piccirillo, Bruno, Karimi, Ebrahim, Santamato, Enrico·2009·Physical Review Letters

Abstract

The optical "spin-orbit" coupling occurring in a suitably patterned nonuniform birefringent plate known as a "q plate" allows entangling the polarization of a single photon with its orbital angular momentum (OAM). This process, in turn, can be exploited for building a bidirectional "spin-OAM interface," capable of transposing the quantum information from the spin to the OAM degree of freedom of photons and vice versa. Here, we experimentally demonstrate this process by single-photon quantum tomographic analysis. Moreover, we show that two-photon quantum correlations such as those resulting from coalescence interference can be successfully transferred into the OAM degree of freedom.

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Crossref · 10.1103/physrevlett.103.013601

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  • Several experiments and numerical simulations demonstrated remarkable spin-controlled unidirectional coupling between circularly-polarized incident light and transversely-propagating surface or waveguide modes.

    “Recently, several experiments and numerical simulations demonstrated remarkable spin-controlled unidirectional coupling between circularly-polarized incident light and transversely-propagating surface or waveguide modes 4 5 -5 2,125-1 28 , see Figs. 4b,c.”

    From Spin–orbit interactions of light (2015) · cites this paper as [126]

    The paper describes an experimentally demonstrated q-plate whose effect on a photon's orbital angular momentum depends on its circular polarization (p. 1). It does not report unidirectional coupling into transversely propagating surface or waveguide modes; its experiment concerns a bidirectional interface between polarization and orbital angular momentum (pp. 1, 3). (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • In all systems studied, the incident light propagated along the transverse y-axis carrying usual SAM depending on its helicity: Sy inc ∝ σ.

    “Indeed, in all systems 4 5 -5 2,125-1 28 the incident light propagated along the transverse y -axis carrying usual SAM depending on its helicity: S y inc ∝σ .”

    From Spin–orbit interactions of light (2015) · cites this paper as [126]

    The paper’s discussion of the q-plate (p. 1) links circular-polarization helicity to optical spin, supporting the helicity-dependent SAM part of the claim. Its experimental setup (p. 2) does not specify propagation along a transverse y-axis, and this study cannot establish the statement about “all systems studied.” (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • The spin-controlled unidirectional coupling effect is very robust to the details of the system and equally appears with near 100%-efficiency at metal surfaces, nanofibers, and various waveguides.

    “Moreover, the effect is very robust to the details of the system and equally appears with near 100%-efficiency at metal surfaces 46,47,49 , nanofibers 48,50,126 , and various waveguides 51,52,125,127,128 .”

    From Spin–orbit interactions of light (2015) · cites this paper as [126]

    The paper’s opening section (p. 1) describes a bidirectional spin–orbital-angular-momentum interface using a q-plate, not spin-controlled unidirectional coupling at surfaces, nanofibers, or waveguides. Its reported approximately 85% q-plate conversion efficiency (p. 1) measures a different process. Searches for unidirectional coupling and the named structures found no passage supporting the claimed robustness or near-100% efficiency. (LLM, conf=0.76)

    Experimental — accuracy not yet measured

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Authors
Nagali, E., Sciarrino, F., De Martini, F., Marrucci, L., Piccirillo, B., Karimi, E., & Santamato, E.
Affiliations
  • National Interuniversity Consortium for the Physical Sciences of Matter (IT)
  • University of Naples Federico II (IT)
Venue
Physical Review Letters
Published
2009-06-29
Volume
103
Issue
1
Pages
013601-013601
ISSN
  • 0031-9007 (ISSN-L)
  • 1079-7114
OpenAlex
W2115344842
Cited by
411
References
19
Citations by year
2026: 13 · 2025: 29 · 2024: 23 · 2023: 25 · 2022: 28 · 2021: 24 · 2020: 27 · 2019: 29 · 2018: 25 · 2017: 37 · 2016: 29 · 2015: 20 · 2014: 21 · 2013: 18 · 2012: 15
FWCI
11.53
Type
journal article
Language
en
Open access
Locations
  • Physical Review Letters (publishedVersion)
  • PubMed (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • IRIS Research product catalog (Sapienza University of Rome) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Orbital Angular Momentum in Optics
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
Keywords
spin-orbit coupling, orbital angular momentum, photon polarization, q-plate, quantum information transfer, polarization entanglement, two-photon correlations

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