Abstract
Abstract Recently, the possibility of obtaining ISE in spectral bands of forbidden light propagation (photonic bandgaps) has been suggested by Yablonovitch.1 These bandgaps are spectral regions admitting only complex wavevectors k (evanescent waves) in any direction, and boundecl by frequencies ωmax((min) at which the dispersion curve ω(k) becomes discontinuous. Because they are associated with definite k (band edges), such hndgaps are delocalized in space, i.e., they inhibit spontaneous emission independently of t.he spatial distribution of emitters in the system. The systems that have been proposed1 for the demonstration of bandgaps are dielectric superlattices that exhibit strong three-dimensional (3D) periodic moclulations of the dielectric index with a period comparable to half the emission wavelength.
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