Journal
PHYSICAL REVIEW LETTERS
Volume 105, Issue 14, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.143901
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Funding
- Cluster of Excellence Engineering of Advanced Materials of the University Erlangen-Nuremberg
- German Academy of Science Leopoldina [LPDS 2009-13]
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We experimentally study the impact of intrinsic and extrinsic curvature of space on the evolution of light. We show that the topology of a surface matters for radii of curvature comparable with the wavelength, whereas for macroscopically curved surfaces only intrinsic curvature is relevant. On a surface with constant positive Gaussian curvature we observe periodic refocusing, self-imaging, and diffractionless propagation. In contrast, light spreads exponentially on surfaces with constant negative Gaussian curvature. For the first time we realized two beam interference in negatively curved space.
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