Enhanced light diffraction from a double-layer microsphere lattice

Miyazaki, Hideki T.; Miyazaki, Hiroshi; Shinya, Norio; Miyano, Kenjiro
November 2003
Applied Physics Letters;11/3/2003, Vol. 83 Issue 18, p3662
Academic Journal
Anomalously strong diffraction, whose efficiency is as high as 55%, has been observed from a double-layer microsphere lattice. The enhancement is due to the specular resonance scattering from two spheres in contact, each belonging to the top and bottom layers of the double-layer, respectively. The system thus works as a single layer two-dimensional (2D) lattice of bispheres. No enhancement is observed from a single-layer lattice nor from triple-layer lattice. It functions as a “blazed” transmission grating with 2D spectral dispersion compared with the one-dimensional dispersion in ordinary linear gratings. © 2003 American Institute of Physics.


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