Reduced volume and reflection for bright optical tweezers with radial Laguerre–Gauss beams
Abstract
Spatially structured light has opened a wide range of opportunities for enhanced imaging as well as optical manipulation and particle confinement. Here, we show that phase-coherent illumination with superpositions of radial Laguerre–Gauss (LG) beams provides improved localization for bright optical tweezer traps, with narrowed radial and axial intensity distributions. Further, the Gouy phase shifts for sums of tightly focused radial LG fields can be exploited for phase-contrast strategies at the wavelength scale. One example developed here is the suppression of interference fringes from reflection near nanodielectric surfaces, with the promise of improved cold-atom delivery and manipulation.
Additional Information
© 2020 the Author(s). Published by PNAS. This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND). Contributed by H. J. Kimble, August 17, 2020 (sent for review July 6, 2020; reviewed by Takao Aoki and Mark Saffman). PNAS first published October 2, 2020. We thank Robert Boyd and Nick Black for discussions related to SLMs. J.L. acknowledges funding from the French–US Fulbright Commission, French National Research Agency NanoStrong Project ANR-18-CE47-0008, and Région Ile-de-France (DIM SIRTEQ). H.J.K. acknowledges funding from Office of Naval Research (ONR) Multidisciplinary University Research Initiative (MURI) Quantum Opto-Mechanics with Atoms and Nanostructured Diamond Grant N000141512761, ONR Grant N000141612399, Air Force Office of Scientific Research (AFOSR) MURI Photonic Quantum Matter Grant FA95501610323, NSF Grant PHY1205729, and Caltech Kavli Nanoscience Institute (KNI). Data Availability: This article contains no measured data associated with the theoretical results presented, excepting preliminary measurements shown in Figs. S7 and S8 in the Supporting Information (SI) for which the data are clearly displayed. Numerical results calculated from the underlying theory of the article and SI are deposited in a publicly available archive (The Caltech Research Data Repository https://data.caltech.edu/), with specific links given in the main article and SI. Further information is available from the lead author J-.B.B. upon request to jbbeguin@caltech.edu. Author contributions: J.-B.B., J.L., X.L., A.P.B., Z.Q., and H.J.K. designed research; J.-B.B., J.L., X.L., A.P.B., Z.Q., and H.J.K. performed research; J.-B.B., J.L., and X.L. contributed new analytic tools; J.-B.B., J.L., and X.L. analyzed data; and J.-B.B., J.L., X.L., A.P.B., Z.Q., and H.J.K. wrote the paper. Reviewers: T.A., Waseda University; and M.S., University of Wisconsin–Madison. The authors declare no competing interest.Attached Files
Published - 26109.full.pdf
Submitted - 2001.11498.pdf
Supplemental Material - pnas.2014017117.sapp.pdf
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Additional details
- Alternative title
- Reduced volume and reflection for optical tweezers with radial Laguerre-Gauss beams
- PMCID
- PMC7584898
- Eprint ID
- 102475
- Resolver ID
- CaltechAUTHORS:20200409-171501867
- French-US Fulbright Commission
- ANR-18-CE47-0008
- Agence Nationale pour la Recherche (ANR)
- Région Ile-de-France
- N00014-15-1-2761
- Office of Naval Research (ONR)
- N00014-16-1-2399
- Office of Naval Research (ONR)
- FA9550-16-1-0323
- Air Force Office of Scientific Research (AFOSR)
- PHY-1205729
- NSF
- Kavli Nanoscience Institute
- Created
-
2020-04-10Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field
- Caltech groups
- Kavli Nanoscience Institute