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Dielectric microparticles optically propelled along an air-filled hollow-core PCF come to a halt just before an absorbing mark on the fiber coating, when radiation pressure is opposed by an equal and opposite thermophoretic force.
Hollow-core photonic crystal fiber (HC-PCF) with all its hollow channels (core and cladding holes) liquid-filled can support photonic band gap guidance of a single mode [1]. Recently we have demonstrated that such liquid-filled HC-PCFs can be used to guide and propel micro-spheres over long (10s of cms) and flexible pathways [2]. The speed of optically-guided particles depends on the balance between...
Keeping light tightly guided, over metre-long distances, in both nanoscale solid glass cores and hollow cores allows enhanced and highly reproducible control of linear and nonlinear interactions between light, acoustic vibrations and trapped particles.
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