Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Non-contact optical control of multiple particles and defects using holographic optical trapping with phase-only liquid crystal spatial light modulator

[+] Author Affiliations
Suman Anand

Univ. of Colorado at Boulder (USA) and Amity Univ. (India)

Rahul P. Trivedi, Gabriel Stockdale, Ivan I. Smalyukh

Univ. of Colorado at Boulder (USA)

Proc. SPIE 7232, Emerging Liquid Crystal Technologies IV, 723208 (February 03, 2009); doi:10.1117/12.807873
Text Size: A A A
From Conference Volume 7232

  • Emerging Liquid Crystal Technologies IV
  • Liang-Chy Chien; Ming Hsien Wu
  • San Jose, CA | January 24, 2009

abstract

In this work, three-dimensional manipulation of multiple defects and structures is performed in the framework of holographic optical trapping approach using a spatial light modulator. A holographic optical tweezers system is constructed using a liquid crystal spatial light modulator to generate multiple optical traps. We optimize the tweezers setup to perform polarization-sensitive holographic optical trapping and then explore properties of optical trapping in thermotropic liquid crystals and compare them to the case of isotropic fluids. One of the major challenges complicating the quantitative measurements in these fluids is the anisotropic nature of the liquid crystal medium, which makes the tight focusing of the laser beam difficult and considerably weakens optical trapping forces. Using liquid crystals with low birefringence allows us to mitigate these artefacts. Optical trapping forces and the trap stiffness are first calibrated for different laser powers using viscous drag forces. This is then used to probe inter-particle and defect-particle interaction forces as well as to characterize tension of line defects in the bulk of liquid crystals.

© (2009) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Suman Anand ; Rahul P. Trivedi ; Gabriel Stockdale and Ivan I. Smalyukh
"Non-contact optical control of multiple particles and defects using holographic optical trapping with phase-only liquid crystal spatial light modulator", Proc. SPIE 7232, Emerging Liquid Crystal Technologies IV, 723208 (February 03, 2009); doi:10.1117/12.807873; http://dx.doi.org/10.1117/12.807873


Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.