5 March 2013 Evanescent field trapping of bacterial spores using photonic crystal cavities
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Abstract
We experimentally demonstrate optical trapping of single B. subtilis spores using the enhanced field of a cavity at resonance in a planar silicon photonic crystal. By tracking the suppressed Brownian motion of a spore in three types of optical traps, generated with three types of cavities (H0, H1 and L3) we derive trap stiffnesses of around 7.6 pN/nm/W and find good agreement with calculated values obtained with 3D FDTD simulations. We envision that planar photonic crystals provide a suitable platform for the manipulation and sensing of bio-particles.
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Thijs van Leest, Thijs van Leest, Jaap Caro, Jaap Caro, "Evanescent field trapping of bacterial spores using photonic crystal cavities", Proc. SPIE 8570, Frontiers in Biological Detection: From Nanosensors to Systems V, 857006 (5 March 2013); doi: 10.1117/12.2002046; https://doi.org/10.1117/12.2002046
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