We have investigated resonant nanocavities coupled to photonic crystal waveguides for biosensing. The devices are fabricated using electron beam lithography and reactive-ion-etching. Preliminary results demonstrate successful detection of human IgG molecules and refractive index sensing.
(230.0230) Optical devices : Optical devices
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(280.1415) Remote sensing and sensors : Biological sensing and sensors
(230.5298) Optical devices : Photonic crystals
S. Pal, E. Guillermain, B. L. Miller, and P. M. Fauchet, "Nanocavities in Photonic Crystal Waveguides for Label-Free Biosensing," in Frontiers in Optics 2010/Laser Science XXVI, OSA Technical Digest (CD) (Optical Society of America, 2010), paper FWF1.