Disorder-induced resonance shifts in high-index-contrast photonic crystal nanocavities

被引：26
|
作者：
Ramunno, L. [1 ]
Hughes, S. [2 ]
机构：
[1] Univ Ottawa, Dept Phys, Ottawa, ON K1N 6N5, Canada
[2] Queens Univ, Dept Phys, Kingston, ON K7L 3N6, Canada
来源：
PHYSICAL REVIEW B | 2009年 / 79卷 / 16期
关键词：
microcavities; nanophotonics; nanostructured materials; photonic crystals; SPONTANEOUS EMISSION; SCATTERING; LOSSES;
D O I：
10.1103/PhysRevB.79.161303
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An optical scattering theory is introduced that predicts significant disorder-induced resonance shifts for photonic crystal nanocavities. These counterintuitive modal frequency shifts stem from the subtle role of local electric fields at perturbed (disordered) high-index-contrast interfaces. Using a representative cavity with a quality factor of 40 000 and an effective mode volume of 0.07 mu m(3), the cavity mode frequency is found to blueshift by up to several meV-even for nanometer-scale imperfections at the dielectric interface-which is several orders of magnitude larger than the cavity linewidth. These disorder-induced resonance shifts apply to a wide range of fabricated photonic nanostructures and scale approximately with the inverse mode volume.
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页数：4
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