title: Large-angular separation of particles induced by cascaded deflection angles in optical sorting.
abstract: A composite microlens array (MLA) with two cascaded guiding axes has been fabricated to achieve a large lateral separation of an object with different refractive indices or sizes. The MLA projects a composite pattern formed by its focal spots into a microchamber for optical sorting in a microscopic system. This approach enables passive, high power, efficient, and continuous microfluidic sorting without requiring complicated optical assembly. Separation of particles with different refractive indices to a lateral angle of 40° is experimentally demonstrated with moderate laser power.
authors.affiliation: Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education of China, Nankai University, Tianjin 300071, China.
authors.forename: X-C
authors.initials: XC
authors.lastname: Yuan
authors.forename: S W
authors.initials: SW
authors.lastname: Zhu
authors.forename: J
authors.initials: J
authors.lastname: Bu
authors.forename: Y Y
authors.initials: YY
authors.lastname: Sun
authors.forename: J
authors.initials: J
authors.lastname: Lin
authors.forename: Bruce Z
authors.initials: BZ
authors.lastname: Gao