Angular diffraction

Sonja Franke-Arnold, Barry Jack, Jonathan Leach, Miles J Padgett

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)


The angular profile and the orbital angular momentum of a light mode are related by Fourier transform. Any modification of the angular distribution, e. g. via diffraction off a suitably programmed spatial light modulator, influences the orbital angular momentum spectrum of the light. This holds true even at the single photon level. We observe the influence of various angular masks on the orbital angular momentum spectrum, both in the near and the far field, and describe the resulting patterns in terms of angular diffraction. If photons are entangled in their orbital angular momentum, diffraction of one photon affects the orbital angular momentum spectrum of its partner photon, and angular ghost diffraction can be measured in the coincidence counts. We highlight the role of the angular Fourier relationship for these effects.

Original languageEnglish
Title of host publicationComplex Light and Optical Forces III
EditorsEnrique J Galvez, David L Andrews, Jesper Glückstad
Place of PublicationBellingham
Number of pages10
ISBN (Print)978-0819474735
Publication statusPublished - 2009
EventConference on Complex Light and Optical Forces III - San Jose, United States
Duration: 28 Jan 200929 Jan 2009

Publication series

NameProceedings of SPIE
ISSN (Print)1996-756X
ISSN (Electronic)0277-786X


ConferenceConference on Complex Light and Optical Forces III
Country/TerritoryUnited States
CitySan Jose


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