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Title: Crossover from positive to negative optical torque in mesoscale optical matter

Abstract

The photons in circularly polarized light can transfer their quantized spin angular momentum to micro- and nanostructures via absorption and scattering. This normally exerts positive torque on the objects wher the sign (i.e., handedness or angular direction) follows that of the spin angular momentum. Here we show that the sign of the optical torque can be negative in mesoscopic optical matter arrays of metal nanoparticles (NPs) assembled in circularly polarized optical traps. Crossover from positive to negative optical torque, which occurs for arrays with different number, separation and configuration of the constituent particles, is shown to result from many-body interactions as clarified by electrodynamics simulations. Our results establish that both positive and negative optical torque can be readily realized and controlled in optical matter arrays. This property and reconfigurability of the arrays makes possible programmable materials for optomechanical, microrheological and biological applications.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3];  [4];  [5];  [4]; ORCiD logo [1]
  1. Clarkson Univ., Potsdam, NY (United States). Dept. of Chemical and Biomolecular Engineering
  2. The Univ. of Chicago, Chicago, IL (United States). James Franck Inst.; The Univ. of Chicago, Chicago, IL (United States). Dept. of Physics
  3. The Univ. of Chicago, Chicago, IL (United States). James Franck Inst.
  4. The Univ. of Chicago, Chicago, IL (United States). James Franck Inst.; The Univ. of Chicago, Chicago, IL (United States). Dept. of Chemistry
  5. Argonne National Lab. (ANL), Argonne, IL, (United States). Center for Nanoscale Materials
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); W.M. Keck Foundation; U.S. Department of Defense (DOD) - Vannevar Bush Faculty Fellowship; National Science Foundation (NSF)
OSTI Identifier:
1562273
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Han, Fei, Parker, John A., Yifat, Yuval, Peterson, Curtis, Gray, Stephen K., Scherer, Norbert F., and Yan, Zijie. Crossover from positive to negative optical torque in mesoscale optical matter. United States: N. p., 2018. Web. doi:10.1038/s41467-018-07376-7.
Han, Fei, Parker, John A., Yifat, Yuval, Peterson, Curtis, Gray, Stephen K., Scherer, Norbert F., & Yan, Zijie. Crossover from positive to negative optical torque in mesoscale optical matter. United States. doi:10.1038/s41467-018-07376-7.
Han, Fei, Parker, John A., Yifat, Yuval, Peterson, Curtis, Gray, Stephen K., Scherer, Norbert F., and Yan, Zijie. Tue . "Crossover from positive to negative optical torque in mesoscale optical matter". United States. doi:10.1038/s41467-018-07376-7. https://www.osti.gov/servlets/purl/1562273.
@article{osti_1562273,
title = {Crossover from positive to negative optical torque in mesoscale optical matter},
author = {Han, Fei and Parker, John A. and Yifat, Yuval and Peterson, Curtis and Gray, Stephen K. and Scherer, Norbert F. and Yan, Zijie},
abstractNote = {The photons in circularly polarized light can transfer their quantized spin angular momentum to micro- and nanostructures via absorption and scattering. This normally exerts positive torque on the objects wher the sign (i.e., handedness or angular direction) follows that of the spin angular momentum. Here we show that the sign of the optical torque can be negative in mesoscopic optical matter arrays of metal nanoparticles (NPs) assembled in circularly polarized optical traps. Crossover from positive to negative optical torque, which occurs for arrays with different number, separation and configuration of the constituent particles, is shown to result from many-body interactions as clarified by electrodynamics simulations. Our results establish that both positive and negative optical torque can be readily realized and controlled in optical matter arrays. This property and reconfigurability of the arrays makes possible programmable materials for optomechanical, microrheological and biological applications.},
doi = {10.1038/s41467-018-07376-7},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United States},
year = {2018},
month = {11}
}

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Cited by: 6 works
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