Hologram of a Single Photon -- Scheme (IMAGE)
Caption
Scheme of the experimental setup for measuring holograms of single photons at the Faculty of Physics, University of Warsaw. (The experiment started with a pair of photons with flat wavefronts and perpendicular polarizations. The different polarization made it possible to separate the photons in a crystal and make one of them 'unknown' by curving their wavefronts using a cylindrical lens. Once the photons were reflected by mirrors, both photons were directed towards the beam splitter (a calcite crystal). The splitter didn't change the direction of vertically polarized photons, but it did diverge diplace horizontally polarized photons. In order to make each direction equally probable and to make sure the crystal acted as a beam splitter, the planes of photon polarization were bent by 45 degrees before the photons entered the splitter. By repeating the measurements several times, the researchers obtained an interference image corresponding to the hologram of the unknown photon viewed from a single point in space.)
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Source: FUW/dualcolor.pl/jch
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The image may only be used with appropriate caption: Scheme of the experimental setup for measuring holograms of single photons at the Faculty of Physics, University of Warsaw. (The experiment started with a pair of photons with flat wavefronts and perpendicular polarisations. The different polarisation made it possible to separate the photons in a crystal and make one of them 'unknown' by curving their wavefronts using a cylindrical lens. Once the photons were reflected by mirrors, both photons were directed towards the beam splitter (a calcite crystal). The splitter didn't change the direction of vertically-polarised photons, but it did diverge diplace horizontally-polarised photons. In order to make each direction equally probable and to make sure the crystal acted as a beam splitter, the planes of photon polarisation were bent by 45 degrees before the photons entered the splitter. By repeating the measurements several times, the researchers obtained an interference image corresponding to the hologram of the unknown photon viewed from a single point in space.) (Source: FUW/dualcolor.pl/jch)
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