Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Potential mapping of optical tweezers

Not Accessible

Your library or personal account may give you access

Abstract

Optical tweezers are very often used for measurement of piconewton range forces. Depending on the displacement of the trapped bead, the trap may become stiffer which causes considerable underestimation of the measured force. We have shown, both by theory and experiment, that such a stiffening occurs for beads larger than 0.5μm in radius. For the first time, we have shown that the displacement at which the stiffening starts is size dependent and that the stiffening starts at higher forces for larger beads. We have shown that for the applications, which simultaneous force measurement and position sensing are on demand (such as biopolymer stretching), mid-range sized (1.5μm in radius) beads could be the best choice.

© 2011 Optical Society of America

Full Article  |  PDF Article
More Like This
Axial potential mapping of optical tweezers for biopolymer stretching: the bead size matters

Arash Ahmadi and S. Nader S. Reihani
Opt. Lett. 38(5) 685-687 (2013)

Role of condenser iris in optical tweezer detection system

Akbar Samadi and S. Nader S. Reihani
Opt. Lett. 36(20) 4056-4058 (2011)

The effect of immersion oil in optical tweezers

Ali Mahmoudi and S. Nader S. Reihani
Opt. Express 19(16) 14794-14800 (2011)

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 Optica member, or as an authorized user of your institution.

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

Figures (3)

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

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

Equations (1)

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

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

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved