Optimized rotation of an optically trapped particle for micro mixing

Mahmoud Hosseinzadeh, Faegheh Hajizadeh, Mehdi Habibi, Hossain Milani Moghaddam, S.N.S. Reihani

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

The angular momentum transferred by circularly polarized photons is able to rotate an optically trapped microparticle. Here, the optically rotating particle is introduced as an active micromixer to reduce the mixing time in a microfluidic system. To optimize the system for microfluidic application, the effect of several optical parameters such as spherical aberration and the numerical aperture of the objective on the rotation rate of a trapped particle is investigated. The results show that the optimized depth for the rotation of a particle is located close to the coverslip and can be changed by a fine adjustment of the refractive index of the immersion oil. By applying the obtained optimized optical parameters on a trapped particle at the interface of two fluids in a microchannel, the mixing length is reduced by a factor of ∼2.

Original languageEnglish
Article number223701
JournalApplied physics letters
Volume113
Issue number22
DOIs
Publication statusPublished - 27 Nov 2018

Fingerprint Dive into the research topics of 'Optimized rotation of an optically trapped particle for micro mixing'. Together they form a unique fingerprint.

  • Cite this

    Hosseinzadeh, M., Hajizadeh, F., Habibi, M., Milani Moghaddam, H., & Reihani, S. N. S. (2018). Optimized rotation of an optically trapped particle for micro mixing. Applied physics letters, 113(22), [223701]. https://doi.org/10.1063/1.5053971