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Proceedings Paper

Integrated platform based on high refractive index contrast waveguide for optical guiding and sorting
Author(s): Balpreet Singh Ahluwalia; Olav Gaute Hellesø; Ananth Z. Subramanian; James S. Wilkinson; Jie Chen; Xuyuan Chen
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Paper Abstract

The high-refractive index contrast (▵n ~0.65 as compared to silicon oxide) of Tantalum pentoxide (Ta2O5) waveguide allows strong confinement of light in waveguides of sub-micron thickness (200 nm). This enhances the intensity in the evanescent field, which we have employed for efficient propelling of micro-particles. The feasibility of opto-fluidics sorting of different sized micro-particles based on their varying optical propulsion velocity is suggested. Optical propulsion of fixed red blood cells (RBC) with velocity higher than previously obtained is also reported. The optical propulsion velocities of RBC in isotonic solution (0.25 M sucrose) and water have been compared.

Paper Details

Date Published: 8 February 2010
PDF: 8 pages
Proc. SPIE 7613, Complex Light and Optical Forces IV, 76130R (8 February 2010); doi: 10.1117/12.840632
Show Author Affiliations
Balpreet Singh Ahluwalia, Univ. of Tromsø (Norway)
Olav Gaute Hellesø, Univ. of Tromsø (Norway)
Ananth Z. Subramanian, Univ. of Southampton (United Kingdom)
James S. Wilkinson, Univ. of Southampton (United Kingdom)
Jie Chen, Vestfold Univ. College (Norway)
Xuyuan Chen, Vestfold Univ. College (Norway)

Published in SPIE Proceedings Vol. 7613:
Complex Light and Optical Forces IV
Enrique J. Galvez; David L. Andrews; Jesper Glückstad, Editor(s)

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