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Título

Angular momentum of optical vortex arrays

AutorCourtial, Johannes; Zambrini, Roberta ; Dennis, Mark R.; Vasnetsov, Mikhail
Palabras claveOptics
Orbital angular momentum
Optical vortices, mechanics
Fecha de publicación23-ene-2006
EditorOptical Society of America
CitaciónOptics Express 14, 938-949 (2006)
ResumenGuided by the aim to construct light fields with spin-like orbital angular momentum (OAM), that is light fields with a uniform and intrinsic OAM density, we investigate the OAM of strictly periodic arrays of optical vortices with rectangular symmetry. We find that the OAM per unit cell depends on the choice of unit cell and can even change sign when the unit cell is translated. This is the case even if the OAM in each unit cell is intrinsic, that is independent of the choice of measurement axis. We show that spin-like OAM can be found only if the OAM per unit cell vanishes. Our results are applicable to the z component of the angular momentum of any x- and y-periodic momentum distribution in the xy plane, and can also be applied to other periodic light beams and arrays of rotating solids or liquids.
Versión del editorhttp://dx.doi.org/10.1364/OPEX.14.000938
URIhttp://hdl.handle.net/10261/6062
DOI10.1364/OPEX.14.000938
ISSN1094-4087
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