Photon orbital angular momentum in astronomy
نویسندگان
چکیده
منابع مشابه
Photon Orbital Angular Momentum in Astrophysics
Astronomical observations of the orbital angular momentum of photons, a property of electromagnetic radiation that has come to the fore in recent years, have apparently never been attempted. Here, I show how measurements of this property of photons have a number of astrophysical applications. Subject headings: Instrumentation: Miscellaneous – Masers – ISM: General – Extraterrestrial Intelligenc...
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Electromagnetic fields can carry, besides energy, linear and angular momentum. The exchange of linear momentum with matter produces forces due to radiation pressure. That comet tails point away from the Sun because light carries linear momentum was first suggested by Kepler. A complete account of radiation pressure was developed by Poynting in 1905 in terms of electromagnetic linear momentum de...
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Abstract Photons carrying an orbital angular momentum (OAM) are present in the off-axis radiation of higher harmonics of helical undulators. Usually, the purity and visibility of OAM carrying photons is blurred by the electron beam emittance. However, high brightness OAM beams are expected in Ultimate Storage Rings (USRs) and FELs, and they may trigger a new class of experiments utilizing the v...
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We put forward an approach to estimate the amount of bipartite spatial entanglement of down-converted photon states correlated in orbital angular momentum and the magnitude of the transverse radial wave vectors. Both degrees of freedom are properly considered in our framework, which only requires azimuthal local linear optical transformations and mode selection analysis with two fiber detectors...
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We propose to realize an optical device based on the properties of photon orbital angular momentum (POAM) to detect the presence of closeby faint companions in double systems using Laguerre-Gaussian (L-G) modes of the light. We test also the possibility of using L-G modes to build coron-agraph mask. We realized in the laboratory a prototype using a blazed l=1 hologram to simulate the separation...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2008
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:200809791