PHOTONIC BAND-STRUCTURE - THE FACE-CENTERED-CUBIC CASE

We employ the concepts of band theory to describe the behavior of electromagnetic waves in three-dimensionally periodic face-centered-cubic (fee) dielectric structures. This can produce a “photonic band gap” in which optical modes, spontaneous emission, and zero point fluctuations are all absent. In the course of a broad experimental survey, we have found that most fee dielectric structures have “semimetallic” band structure. Nevertheless, we have identified one particular dielectric “crystal” that actually has a “photonic band gap.” This dielectric structure consisting of 86% empty space, requires a refractive-index contrast of greater than 3:1, which happens to be readily obtainable in semiconductor materials. © 1990 Optical Society of America.