Photonic crystal nanobeam cavity strongly coupled to the feeding waveguide

Qimin Quan; Deotare, Parag B.; Loncar, Marko
May 2010
Applied Physics Letters;5/17/2010, Vol. 96 Issue 20, p203102
Academic Journal
A deterministic design of an ultrahigh Q-factor, wavelength-scale photonic crystal nanobeam cavity is proposed and experimentally demonstrated. Using this approach, cavities with Q>106 and on-resonance transmission T>90% are designed. The devices, fabricated in silicon and capped with a low refractive index polymer, have experimental Q=80 000 and T=73%. This is, to the best of our knowledge, the highest transmission measured in deterministically designed, wavelength-scale high-Q cavities.


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