Accession Number:

ADA590023

Title:

Tunable Optical Tweezers for Wavelength-dependent Measurements

Descriptive Note:

Journal article

Corporate Author:

APPALACHIAN STATE UNIV BOONE NC

Report Date:

2012-04-23

Pagination or Media Count:

9.0

Abstract:

Optical trapping forces depend on the difference between the trap wavelength and the extinction resonances of trapped particles. This leads to a wavelength-dependent trapping force, which should allow for the optimization of optical tweezers systems, simply by choosing the best trapping wavelength for a given application. Here we present an optical tweezer system with wavelength tunability, for the study of resonance effects. With this system, the optical trap stiffness is measured for single trapped particles that exhibit either single or multiple extinction resonances. We include discussions of wavelength-dependent effects, such as changes in temperature, and how to measure them.

Subject Categories:

  • Electricity and Magnetism
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE