Bidirectional Nanoparticle Transporting Optical Burettes with All-dielectric Bowtie Core Capillaries

We present an optical burette with an all-dielectric bowtie core capillary structure that can transport nanoparticles bidirectionally with incident light from one end. We confirm that nanosized particles can be moved along a capillary length of $\approx$20$\mu$m simply by adjusting the focus position of the input light.