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Probing the topological charge of a vortex beam with dynamic angular double slits

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arxiv 1501.05986 v1 pith:TSQMVCWT submitted 2015-01-24 physics.optics quant-ph

Probing the topological charge of a vortex beam with dynamic angular double slits

classification physics.optics quant-ph
keywords vortexangularchargetopologicalbeambeamsdoubledynamic
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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When a vortex beam with the spiral phase structure passes through a dynamic angular double slits (ADS), the interference pattern changes alternatively between destructive and constructive at the angular bisector direction of the ADS due to their phase difference. Based on this property, we experimentally demonstrate a simple method, which can precisely and efficiently determine the topological charge of vortex beams. What is more, this scheme allows determining both the modulus and sign of the topological charge of vortex beams simultaneously.

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