Evidence map›Paper›PMID 42103710›Full record

ArticleNature communications2026

Speckle-based measurement of the fractional azimuthal index of orbital angular momentum beams for refractive index sensing.

Christopher Perrella, Aman Anil Punse, Anastasiia Zalogina, Crispin Szydzik, Megan Lim, Andreas Boes, Arnan Mitchell, Kylie R Dunning, Kishan Dholakia

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors.

Christopher Perrella *Centre of Light for Life, School of Biological Sciences, Adelaide University, Adelaide, SA, Australia.ORCID http://orcid.org/0000-0002-6140-9323
Aman Anil Punse *Centre of Light for Life, School of Biological Sciences, Adelaide University, Adelaide, SA, Australia.ORCID http://orcid.org/0000-0002-2902-7659
Anastasiia ZaloginaCentre of Light for Life, School of Biological Sciences, Adelaide University, Adelaide, SA, Australia.ORCID http://orcid.org/0000-0003-3956-0585
Crispin SzydzikARC Centre of Excellence in Optical Microcombs for Breakthrough Science (COMBS), RMIT University, Melbourne, VIC, Australia.ORCID http://orcid.org/0000-0003-3812-890X
Megan LimCentre of Light for Life, School of Biological Sciences, Adelaide University, Adelaide, SA, Australia.ORCID http://orcid.org/0000-0002-9868-429X
Andreas BoesInstitute for Photonics and Advanced Sensing, Adelaide University, Adelaide, SA, Australia.ORCID http://orcid.org/0000-0001-8443-3396
Arnan MitchellARC Centre of Excellence in Optical Microcombs for Breakthrough Science (COMBS), RMIT University, Melbourne, VIC, Australia.ORCID http://orcid.org/0000-0002-2463-2956
Kylie R DunningCentre of Light for Life, School of Biological Sciences, Adelaide University, Adelaide, SA, Australia.ORCID http://orcid.org/0000-0002-0462-6479
Kishan DholakiaCentre of Light for Life, School of Biological Sciences, Adelaide University, Adelaide, SA, Australia. kishan.dholakia@adelaide.edu.au.ORCID http://orcid.org/0000-0001-6534-9009

Funding

Department of Education and Training | Australian Research Council (ARC) CE230100006Department of Education and Training | Australian Research Council (ARC) DE230100964Department of Education and Training | Australian Research Council (ARC) FL210100099Department of Education and Training | Australian Research Council (ARC) FT240100291Department of Health | National Health and Medical Research Council (NHMRC) APP2029067United States Department of Defense | United States Navy | ONR | Office of Naval Research Global (ONR Global) N62909-25-1-2029
6 · The paper itself

Abstract

Light beams possessing orbital angular momentum (OAM) have gained significant interest in areas such as optical manipulation, quantum entanglement, and super-resolved imaging. The OAM per photon of such beams, typically Laguerre-Gaussian beams, is directly proportional to the azimuthal index l. This index is continuous in nature and a non-trivial parameter to measure. In this study, Laguerre-Gaussian beams of differing l are generated through mode conversion using microscopic spiral phase plates. The value of l depends on the refractive index of the medium surrounding the spiral phase plates. Utilising laser speckle, we demonstrate an ultra-precise measurement of the azimuthal index of the generated beams to a precision of 2 × 10

Identifiers

PMID42103710
PMCPMC13369906

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LicenceCC BY-NC-ND
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.