Spatial coherence of random laser emission |
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Authors: | Redding Brandon Choma Michael A Cao Hui |
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Institution: | Department of Applied Physics, Yale University, New Haven, Connecticut 06511, USA. brandon.redding@yale.edu |
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Abstract: | We experimentally studied the spatial coherence of random laser emission from dye solutions containing nanoparticles. The spatial coherence, measured in a double slit experiment, varied significantly with the density of scatterers and the size and shape of the excitation volume. A qualitative explanation is provided, illustrating the dramatic difference from the spatial coherence of a conventional laser. This work demonstrates that random lasers can be controlled to provide intense, spatially incoherent emission for applications in which spatial cross talk or speckle limit performance. |
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