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Directional dependence of optical radiation from photonic crystal double heterostructure resonant cavities is analyzed using the finite-difference time-domain method. Geometries that mitigate out-of-plane radiation loss with dielectric substrates are analyzed.
An increase in the spectral width of microdisk laser spectra biased slightly above threshold is experimentally observed, and an increase in spontaneous emission rate in devices with small optical mode volume is demonstrated.
Silicon-on-insulator ultra-high Q resonators with improved thermal properties are reported. A thin Si pedestal layer between microdisk and oxide increases the thermal conductivity dramatically, while Q is preserved, enabling higher field intensities in nonlinear-optical applications.
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