Random high-Q cavities in disordered photonic crystal waveguides

J. Topolancik, F. Vollmer, B. Ilic
2007 Applied Physics Letters  
We present direct observations of electromagnetic fields localized in disordered photonic crystal waveguides and report the modal volumes and quality factors of the confined modes. Geometrical perturbations distributed uniformly throughout the crystal lattice were introduced by changing orientations of the polygonal lattice elements. Cavities in the disordered waveguides were excited by resonant coupling through a chain of random open resonators. Localized optical resonances with sub-͑ / n͒ 3
more » ... with sub-͑ / n͒ 3 modal volumes and quality factors of up to ϳ150 000 were observed.
doi:10.1063/1.2809614 fatcat:owlueghshzh77o6km7yeratgom