Physics – Optics
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005phrvl..94c3903h&link_type=abstract
Physical Review Letters, vol. 94, Issue 3, id. 033903
Physics
Optics
106
Photonic Bandgap Materials, Electromagnetic Wave Propagation, Radiowave Propagation, Diffraction And Scattering, Nonlinear Optics
Scientific paper
Formulas are presented that provide clear physical insight into the phenomenon of extrinsic optical scattering loss in photonic crystal waveguides due to random fabrication imperfections such as surface roughness and disorder. Using a photon Green-function-tensor formalism, we derive explicit expressions for the backscattered and total transmission losses. Detailed calculations for planar photonic crystals yield extrinsic loss values in overall agreement with experimental measurements, including the full dispersion characteristics. We also report that loss in photonic crystal waveguides scales inversely with group velocity, at least, thereby raising serious questions about future low-loss applications based on operating frequencies that approach the photonic band edge.
Hughes Scott S.
Ramunno Lora
Sipe John E.
Young Jeff F.
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