Generation of optical accelerating regular triple-cusp beams and their topological structures

By using the diffractive optical elements written onto a spatial light modulator, we experimentally obtain optical regular triple-cusp beams. Their propagation characteristics and topological structures are subsequently investigated. The experimental results demonstrate that each cusp of an optical regular triple-cusp beam, similar to the main lobe of an Airy beam, propagates along curved paths in free space, hence tends to adopt the "transverse acceleration" property. Moreover, we experimentally prove that optical regular triple-cusp beams can resist local distorted deformation. Such beams can thus be applied in adverse optical environments, such as a probe for the exploration of microscopic world and as an energy source for research on high-field laser-matter interactions.