Spiral bandwidth of four-wave mixing in Rb vapour

R. F. Offer; D. Stulga; E. Riis; S. Franke-Arnold; A. S. Arnold

doi:10.1038/s42005-018-0077-5

Spiral bandwidth of four-wave mixing in Rb vapour

R. F. Offer, D. Stulga, E. Riis, S. Franke-Arnold, A. S. Arnold

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

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Abstract

Laguerre-Gauss beams, and more generally the orbital angular momentum of light (OAM) provide valuable research tools for optical manipulation, processing, imaging and communication. High-efficiency frequency conversion of OAM is possible via four-wave mixing in rubidium vapour. Conservation of the OAM in the two pump beams determines the total OAM shared by the generated light fields at 420nm and 5.2um - but not its distribution between them. Here we experimentally investigate the spiral bandwidth of the generated light modes as a function of pump OAM. A small pump OAM is transferred almost completely to the 420nm beam. Increasing the total pump OAM broadens the OAM spectrum of the generated light, indicating OAM entanglement between the generated light fields. This clears the path to high-efficiency OAM entanglement between widely disparate wavelengths.

Original language	English
Article number	84
Number of pages	8
Journal	Communications Physics
Volume	1
DOIs	https://doi.org/10.1038/s42005-018-0077-5
Publication status	Published - 21 Nov 2018

Keywords

orbital angular momentum of light (OAM)
Laguerre-Gauss beams
four-wave mixing
spiral bandwidth
optical manipulation

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10.1038/s42005-018-0077-5Licence: CC BY 4.0

Offer-etal-CP-2018-Spiral-bandwidth-of-four-wave-mixing-in-Rb-vapourFinal published version, 1.72 MBLicence: CC BY 4.0

Cite this

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title = "Spiral bandwidth of four-wave mixing in Rb vapour",

abstract = "Laguerre-Gauss beams, and more generally the orbital angular momentum of light (OAM) provide valuable research tools for optical manipulation, processing, imaging and communication. High-efficiency frequency conversion of OAM is possible via four-wave mixing in rubidium vapour. Conservation of the OAM in the two pump beams determines the total OAM shared by the generated light fields at 420nm and 5.2um - but not its distribution between them. Here we experimentally investigate the spiral bandwidth of the generated light modes as a function of pump OAM. A small pump OAM is transferred almost completely to the 420nm beam. Increasing the total pump OAM broadens the OAM spectrum of the generated light, indicating OAM entanglement between the generated light fields. This clears the path to high-efficiency OAM entanglement between widely disparate wavelengths.",

keywords = "orbital angular momentum of light (OAM), Laguerre-Gauss beams, four-wave mixing, spiral bandwidth, optical manipulation",

author = "Offer, {R. F.} and D. Stulga and E. Riis and S. Franke-Arnold and Arnold, {A. S.}",

year = "2018",

month = nov,

day = "21",

doi = "10.1038/s42005-018-0077-5",

language = "English",

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journal = "Communications Physics",

issn = "2399-3650",

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TY - JOUR

T1 - Spiral bandwidth of four-wave mixing in Rb vapour

AU - Offer, R. F.

AU - Stulga, D.

AU - Riis, E.

AU - Franke-Arnold, S.

AU - Arnold, A. S.

PY - 2018/11/21

Y1 - 2018/11/21

N2 - Laguerre-Gauss beams, and more generally the orbital angular momentum of light (OAM) provide valuable research tools for optical manipulation, processing, imaging and communication. High-efficiency frequency conversion of OAM is possible via four-wave mixing in rubidium vapour. Conservation of the OAM in the two pump beams determines the total OAM shared by the generated light fields at 420nm and 5.2um - but not its distribution between them. Here we experimentally investigate the spiral bandwidth of the generated light modes as a function of pump OAM. A small pump OAM is transferred almost completely to the 420nm beam. Increasing the total pump OAM broadens the OAM spectrum of the generated light, indicating OAM entanglement between the generated light fields. This clears the path to high-efficiency OAM entanglement between widely disparate wavelengths.

AB - Laguerre-Gauss beams, and more generally the orbital angular momentum of light (OAM) provide valuable research tools for optical manipulation, processing, imaging and communication. High-efficiency frequency conversion of OAM is possible via four-wave mixing in rubidium vapour. Conservation of the OAM in the two pump beams determines the total OAM shared by the generated light fields at 420nm and 5.2um - but not its distribution between them. Here we experimentally investigate the spiral bandwidth of the generated light modes as a function of pump OAM. A small pump OAM is transferred almost completely to the 420nm beam. Increasing the total pump OAM broadens the OAM spectrum of the generated light, indicating OAM entanglement between the generated light fields. This clears the path to high-efficiency OAM entanglement between widely disparate wavelengths.

KW - orbital angular momentum of light (OAM)

KW - Laguerre-Gauss beams

KW - four-wave mixing

KW - spiral bandwidth

KW - optical manipulation

UR - https://arxiv.org/abs/1805.08190

UR - https://www.nature.com/commsphys

U2 - 10.1038/s42005-018-0077-5

DO - 10.1038/s42005-018-0077-5

M3 - Article

SN - 2399-3650

VL - 1

JO - Communications Physics

JF - Communications Physics

M1 - 84

ER -

Spiral bandwidth of four-wave mixing in Rb vapour

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Aidan Arnold

Erling Riis

Doctoral Training Partnership (DTA - University of Strathclyde)

Data for: "Spiral bandwidth of four-wave mixing in rubidium vapour"

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Spiral bandwidth of four-wave mixing in Rb vapour

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Keywords

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Aidan Arnold

Erling Riis

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Doctoral Training Partnership (DTA - University of Strathclyde)

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Data for: "Spiral bandwidth of four-wave mixing in rubidium vapour"

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