Journal
PHYSICS OF THE SOLID STATE
Volume 53, Issue 5, Pages 1056-1061Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S106378341105026X
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- Russian Foundation for Basic Research [08-02-00642, 08-02-450]
- St. Petersburg Administration
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This paper reports on experimental and theoretical investigations of light diffraction from thin films of synthetic opal. The diffraction patterns have been studied visually and recorded in different scattering geometries with the films illuminated with white unpolarized light. The diffraction pattern obtained with the film illuminated with a light beam along the [111] axis, which is normal to the film surface, has C (6) symmetry and consists of six strong reflections arranged symmetrically with respect to the incident beam. This pattern becomes substantially more complicated when the film is illuminated by white light at an arbitrary angle to the [111] axis. An experimental study of the spectral response and angular relations of the diffraction patterns has established a fairly full pattern of transformation of diffraction reflections obtained under variation of the angle of light incidence on an opal film. The remarkably good matching of experimental and calculated data provides compelling evidence for light diffraction from thin opal films being two-dimensional.
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