Abstract
A photonic crystal is a three-dimensional periodic dielectric structure possessing a frequency band or bandgap over which all electromagnetic modes, spontaneous emission, and zero point fluctuations are forbidden irrespective of propagation directions.1-3 Both theoretical calculations and microwave measurements have shown that the "three hole" face centered cubic (FCC) lattice of cylindrical voids in a dielectric matrix exhibits such a photonic bandgap.1 Photonic crystals are expected to be useful in making high-Q microcavities for single-mode light-emitting diodes and low threshold lasers.
© 1996 Optical Society of America
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