Abstract
The directional optical loss properties of photonic crystal double
heterostructure cavities are analyzed using the three-dimensional finite-difference
time-domain method. It is found that these high quality factor cavities are dominated by
vertical radiation loss, and the addition of heat-sinking lower substrates exacerbates
the vertical loss problem. An alternative heterostructure geometry based on introducing
a glide-plane is proposed and is shown to significantly reduce out-of-plane radiation.
This new geometry is a promising candidate for building chip-scale edge-emitting
photonic crystal lasers operating under continous wave conditions. Alternative vertical
slab structures are investigated, and the plausibility of forming electrically injected
photonic crystal lasers is discussed.
© 2010 IEEE
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