Abstract

We report on a new type of single-point velocimetry microsensor that can be positioned in microfluidic devices by use of optical tweezers. The flag-shaped microsensor is readily made by a low-cost two-photon polymerization technique. At rest the linearly polarized optical tweezer traps the microsensor at the focal point, and the flag-plate gets aligned in the polarization direction. Under a fluid flow, the plate rotates to an equilibrium angle that is used to measure the fluid velocity with a micrometer-size spatial resolution. Experimental results are in good agreement with theoretical calculations of optical and hydrodynamic torques on such a flag-shaped microsensor.

© 2006 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Optically driven Archimedes micro-screws for micropump application

Chih-Lang Lin, Guy Vitrant, Michel Bouriau, Roger Casalegno, and Patrice L. Baldeck
Opt. Express 19(9) 8267-8276 (2011)

Orientation of flat particles in optical tweezers by linearly polarized light

Péter Galajda and Pál Ormos
Opt. Express 11(5) 446-451 (2003)

Multiplying optical tweezers force using a micro-lever

Chih-Lang Lin, Yi-Hsiung Lee, Chin-Te Lin, Yi-Jui Liu, Jiann-Lih Hwang, Tien-Tung Chung, and Patrice L. Baldeck
Opt. Express 19(21) 20604-20609 (2011)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (9)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription