By applying chemical functionalization to a nanobeam photonic crystal cavity, an ultrasensitive gas-phase chemical sensor was demonstrated. Its nonlinear thermo-optical bi-stability is utilized to realize a novel threshold detector for cumulative chemical exposure.
© 2014 OSA
Y. Chen, W. S. Fegadolli, A. Scherer, and M. Li, "Nanobeam Photonic Crystal Cavity Based Multifunctional Gas-Phase Chemical Sensor," in CLEO: 2014, OSA Technical Digest (online) (Optical Society of America, 2014), paper SM3E.5.
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