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Title: Light's Darkness

Optical vortices and orbital angular momentum are currently topical subjects in the optics literature. Although seemingly esoteric, they are, in fact, the generic state of light and arise whenever thmore »ree or more plane waves interfere. To be observed by eye the light must be monochromatic. Laser speckle is one such example, where the optical energy circulates around each black spot, giving a local orbital angular momentum. This talk with report three on-going studies. First, when considering a volume of interfering waves, the laser specs map out threads of complete darkness embedded in the light. Do these threads form loops? Links? Or even knots? Second, when looking through a rapidly spinning window, the image of the world on the other side is rotated: true or false? Finally, the entanglement of orbital angular momentum states means measuring how the angular position of one photons sets the angular momentum of another: is this an angular version of the EPR (Einstein, Podolsky, and Rosen) paradox?« less
Title: Light's Darkness
Publication Date: 2007-06-08
OSTI Identifier: 987268
DOE Contract Number: ACO2-06CH11357
Other Number(s): Other: 20070608-150203-1
Resource Type: Multimedia
Specific Type: Multimedia Presentation
Resource Relation: Conference: APS Colloquium Series, Advanced Photon Source (APS) at Argonne National Laboratory, Argonne, Illinois (United States), presented on June 08, 2007
Research Org: ANL-APS (Argonne National Laboratory-Advanced Photon Source (United States))
Sponsoring Org: USDOE Office of Science (SC)
Publisher: Advanced Photon Source (APS) Colloquium Series Video Collection
Country of Publication: United States
Language: English
Run Time: 0:54:25
System Entry Date: 2016-01-27