Issue |
EPJ Web Conf.
Volume 215, 2019
EOS Optical Technologies
|
|
---|---|---|
Article Number | 16002 | |
Number of page(s) | 3 | |
Section | Optofluidics Posters | |
DOI | https://doi.org/10.1051/epjconf/201921516002 | |
Published online | 10 September 2019 |
https://doi.org/10.1051/epjconf/201921516002
Optical transport of fluorescent diamond particles inside a tapered capillary
Research Institute for Electronic Science, Hokkaido University, Kita 20-jo Nishi 10-chome, Kita-ku, Sapporo, Hokkaido, 001-0020, Japan
* Corresponding author: sasaki@es.hokudai.ac.jp
Published online: 10 September 2019
Optical forces provide an efficient way to sort particles and biological materials according to their optical properties. However, both enhanced optical forces and a large interaction volume are needed in order to optically sort a large number of nanoparticles. We investigate the use of a tapered glass capillary as an optofluidic platform for optical manipulation and optical sorting applications. Tapered capillaries with micrometre and sub-micrometre sizes are fabricated. After filling the tapered capillary with a colloidal solution of red fluorescent diamond particles, a green laser light is coupled into the capillary. The tapered capillary acts both as a microfluidic channel and as an optical waveguide, making it possible for the light to interact with the particles inside the sample solution. Using an incident laser power of few tens of milliwatts, we achieve optical transportation of the brightest particles inside the tapered part of the capillary. Particle velocities as high as few tens of micrometres per second are measured.
© The Authors, published by EDP Sciences, 2019
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