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Three-dimensional coherent optical waves localized on trochoidal parametric surfaces
1Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan.
Abstract:
We theoretically demonstrate that the three-dimensional (3D) coherent laser waves formed by the degenerate Laguerre-Gaussian modes with different longitudinal indices are well localized on rotating trochoidal parametric surfaces. We further use a large-Fresnel-number laser system to realize the existence of the laser modes related to trochoidal coherent states. Experimental results reveal that the exotic laser modes generally originate from a superposition of two degenerate standing-wave trochoidal coherent states.
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