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

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.

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

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trapped particles
microparticles
numerical aperture
microchannels
submerging
aberration
angular momentum
oils
adjusting
refractivity
fluids
photons

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
Hosseinzadeh, Mahmoud ; Hajizadeh, Faegheh ; Habibi, Mehdi ; Milani Moghaddam, Hossain ; Reihani, S.N.S. / Optimized rotation of an optically trapped particle for micro mixing. In: Applied physics letters. 2018 ; Vol. 113, No. 22.
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Hosseinzadeh, M, Hajizadeh, F, Habibi, M, Milani Moghaddam, H & Reihani, SNS 2018, 'Optimized rotation of an optically trapped particle for micro mixing', Applied physics letters, vol. 113, no. 22, 223701. https://doi.org/10.1063/1.5053971

Optimized rotation of an optically trapped particle for micro mixing. / Hosseinzadeh, Mahmoud; Hajizadeh, Faegheh; Habibi, Mehdi; Milani Moghaddam, Hossain; Reihani, S.N.S.

In: Applied physics letters, Vol. 113, No. 22, 223701, 27.11.2018.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Hosseinzadeh, Mahmoud

AU - Hajizadeh, Faegheh

AU - Habibi, Mehdi

AU - Milani Moghaddam, Hossain

AU - Reihani, S.N.S.

PY - 2018/11/27

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N2 - 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.

AB - 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.

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Hosseinzadeh M, Hajizadeh F, Habibi M, Milani Moghaddam H, Reihani SNS. Optimized rotation of an optically trapped particle for micro mixing. Applied physics letters. 2018 Nov 27;113(22). 223701. https://doi.org/10.1063/1.5053971