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Partially coherent multi‐Airy‐like beams are investigated by introducing coordinate transformation parameters and combining them with the theory of multi‐beam superposition under symmetrical conditions, for the case of dual and quad as examples. The accurate propagation position of the mutual‐focusing point is obtained by analyzing the normalized spectral density (SD) curves at different planes. The...
Unidirectional light propagation phenomena are observed in the photonic crystal heterostructures based on anodic alumina membrane when the incident light illuminated from forward and backward directions. Transmittance / reflectance spectra measurements and theoretical calculations show that the origin of this kind of unbalanced reflection is ascribed to the energy loss induced by Rayleigh scattering...
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