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Two-dimensional hexagonal Bravais lattice. (a) SEM image of fabricated large-size 2D H-PhC, scale bar , (b) , and are vectors of the three equivalent gratings in the lattice, with orientation difference of 60°.
Photograph taken from the surface of a 2D H-PhC fabricated by us, showing one-to-many fanout of laser beam. Spot A is the input beam.
Theoretical simulation of fanout light spots on the surface of a 2D hexagonal H-PhC, with and .
Variation of fanout angle with by calculation, with substrate thickness . Three curves are corresponding to , 0.7, and 0.8, respectively.
Calculated spot distance varing with (a) for , and (b) for . Curves I and II are corresponding to substrate thickness and 2 mm, respectively
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