Phys. Rev. B 64, 033308 (2001) [4 pages]Guiding mechanisms in dielectric-core photonic-crystal optical waveguidesReceived 26 February 2001; published 15 June 2001 We show that the main guiding mechanisms in dielectric-core photonic crystal optical waveguides are total internal reflection and distributed Bragg reflection. We also show that by placing a slab of semiconductor material between two photonic band gap (PBG) mirrors, we can obtain waveguide modes at frequencies out of the photonic bandgap. These modes are similar to the modes of a conventional dielectric slab waveguide. Using these modes, we can obtain very good coupling between a PBG waveguide and a dielectric slab waveguide with similar slab properties. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.64.033308
DOI:
10.1103/PhysRevB.64.033308
PACS:
42.70.Qs, 42.79.Gn
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