Journal
APPLIED PHYSICS LETTERS
Volume 76, Issue 19, Pages 2668-2670Publisher
AMER INST PHYSICS
DOI: 10.1063/1.126438
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Three-dimensional (3D) photonic crystal structures can be fabricated into photopolymerizable resins by using laser beam interference with high precision. Three laser beams interfere into a glass cell filled with a liquid photopolymerizable resin to form a hexagonal periodic structure. Rods are formed in a hexagonal arrangement after being photopolymerzed according to the 3D periodic light distribution which results from the laser's interference. Two beams of another laser also interfere to form layers which cross perpendicular to the rod array. After photofabrication, the nonsolidified resin is removed by ethanol. The lattice constant can be selected by tuning the angles of the incident beams and the laser wavelength. We have fabricated a 500 mu mx500 mu mx150 mu m photonic crystal structure, the lattice constant of which is 1 mu m and contains 150 lateral layers. (C) 2000 American Institute of Physics. [S0003- 6951(00)04519-8].
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