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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Radial modal dependence of the azimuthal spectrum after parametric down-conversion
Physical Review A - Atomic, Molecular, and Optical Physics, Volume 89, No. 4, Article 043820, Year 2014
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Description
The radial degrees of freedom of the biphoton states that are produced in spontaneous parametric down-conversion (SPDC) in the Laguerre-Gaussian (LG) basis are investigated, theoretically and experimentally. We calculated the theoretical azimuthal Schmidt numbers for different combinations of radial indices and found that a larger azimuthal Schmidt number is obtained for higher radial indices of the signal and idler beams. Moreover, larger azimuthal Schmidt numbers are also obtained when the difference between the two radial indices increases. Comparing these theoretical predictions with the azimuthal Schmidt numbers obtained from experimentally measurements, we found good agreement. Experimentally we demonstrated that it is possible to obtain a threefold increase in the azimuthal Schmidt number while maintaining a reasonable coincidence count rate by using LG modes with slightly larger radial indices. © 2014 American Physical Society.
Authors & Co-Authors
Zhang, Yingwen
South Africa, Pretoria
The Council for Scientific and Industrial Research
Roux, Filippus Stef
South Africa, Pretoria
The Council for Scientific and Industrial Research
McLaren, Melanie G.
South Africa, Pretoria
The Council for Scientific and Industrial Research
South Africa, Stellenbosch
Stellenbosch University
Forbes, Andrew D.
South Africa, Pretoria
The Council for Scientific and Industrial Research
South Africa, Stellenbosch
Stellenbosch University
South Africa, Durban
University of Kwazulu-natal
Statistics
Citations: 26
Authors: 4
Affiliations: 3
Identifiers
Doi:
10.1103/PhysRevA.89.043820
ISSN:
10502947
e-ISSN:
10941622