40 research outputs found
Modal reflectivity in finite-depth two-dimensional photonic-crystal microcavities
We present finite-difference time-domain calculations of the Q factor for an optical microcavity defined by a slab waveguide and two-dimensional photonic-crystal end mirrors. The effect of the finite depth of the photonic crystal on the cavity s optical modes is examined. From these calculations, we can optimize the performance of the photonic-crystal mirrors and determine the loss mechanisms within optical cavities defined by these structures. The Q of the cavity modes is shown to be strongly dependent on the depth of the holes defining the photonic crystal, as well as the refractive index of the material surrounding the waveguide core
Lasers incorporating two-dimensional photonic crystal mirrors
Photonic bandgap crystals are expected to be
of use in defining microcavities for modifying
spontaneous emission and as highly reflective
mirrors. There are several reports of microfabricating
one-dimensional structure. Here, we describe the incorporation of a microfabricated two-dimensional photonic lattice in an edge-emitting semiconductor laser structure.
We demonstrate laser operation in a cavity formed between a cleaved facet and a microfabricated periodic lattice