Dynamics of optically levitated microparticles in vacuum placed in 2D and 3D optical potentials possessing orbital angular momentum

Yoshihiko Arita, Michael Mazilu, Mingzhou Chen, Tom Vettenburg, Juan M. Aunõn, Ewan M Wright, Kishan Dholakia

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We demonstrate the transfer of orbital angular momentum to optically levitated microparticles in vacuum [1]. We prepare two-dimensional and three-dimensional optical potentials. In the former case the microparticle is placed within a Laguerre-Gaussian beam and orbits the annular beam profile with increasing angular velocity as the air drag coefficient is reduced. We explore the particle dynamics as a function of the topological charge of the levitating beam. Our results reveal that there is a fundamental limit to the orbital angular momentum that may be transferred to a trapped particle, dependent upon the beam parameters and inertial forces present. This effect was predicted theoretically [2] and can be understood considering the underlying dynamics arising from the link between the magnitude of the azimuthal index and the beam radius [3]. Whilst a Laguerre-Gaussian beam scales in size with azimuthal index ', recently we have created a "perfect" vortex beam whose radial intensity profile and radius are both independent of topological charge [4, 5]. As the Fourier transform of a perfect vortex yields a Bessel beam. Imaging a perfect vortex, with its subsequent propagation thus realises a complex three dimensional optical field. In this scenario we load individual silica microparticles into this field and observe their trajectories. The optical gradient and scattering forces interplay with the inertial and gravitational forces acting on the trapped particle, including the rotational degrees of freedom. As a result the trapped microparticle exhibits a complex three dimensional motion that includes a periodic orbital motion between the Bessel and the perfect vortex beam. We are able to determine the three dimensional optical potential in situ by tracking the particle. This first demonstration of trapping microparticles within a complex three dimensional optical potential in vacuum opens up new possibilities for fundamental studies of many-body dynamics, mesoscopic entanglement [6, 7], and optical binding [8, 9].

Original languageEnglish (US)
Title of host publicationOptical Manipulation Conference
PublisherSPIE
Volume10252
ISBN (Electronic)9781510610057
DOIs
StatePublished - 2017
EventOptical Manipulation Conference 2017 - Yokohama, Japan
Duration: Apr 19 2017Apr 21 2017

Other

OtherOptical Manipulation Conference 2017
CountryJapan
CityYokohama
Period4/19/174/21/17

Fingerprint

Angular momentum
microparticles
Angular Momentum
Vacuum
Vortex flow
angular momentum
orbitals
vacuum
Gaussian beams
Vortex
Three-dimensional
Gaussian Beam
vortices
Drag coefficient
Optical Binding
Angular velocity
trapped particles
Radius
Charge
Silicon Dioxide

Keywords

  • Laguerre-Gaussian beam
  • Levitated optomechanics
  • Orbital angular momentum
  • Perfect vortex

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Arita, Y., Mazilu, M., Chen, M., Vettenburg, T., Aunõn, J. M., Wright, E. M., & Dholakia, K. (2017). Dynamics of optically levitated microparticles in vacuum placed in 2D and 3D optical potentials possessing orbital angular momentum. In Optical Manipulation Conference (Vol. 10252). [102520V] SPIE. https://doi.org/10.1117/12.2275309

Dynamics of optically levitated microparticles in vacuum placed in 2D and 3D optical potentials possessing orbital angular momentum. / Arita, Yoshihiko; Mazilu, Michael; Chen, Mingzhou; Vettenburg, Tom; Aunõn, Juan M.; Wright, Ewan M; Dholakia, Kishan.

Optical Manipulation Conference. Vol. 10252 SPIE, 2017. 102520V.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Arita, Y, Mazilu, M, Chen, M, Vettenburg, T, Aunõn, JM, Wright, EM & Dholakia, K 2017, Dynamics of optically levitated microparticles in vacuum placed in 2D and 3D optical potentials possessing orbital angular momentum. in Optical Manipulation Conference. vol. 10252, 102520V, SPIE, Optical Manipulation Conference 2017, Yokohama, Japan, 4/19/17. https://doi.org/10.1117/12.2275309
Arita Y, Mazilu M, Chen M, Vettenburg T, Aunõn JM, Wright EM et al. Dynamics of optically levitated microparticles in vacuum placed in 2D and 3D optical potentials possessing orbital angular momentum. In Optical Manipulation Conference. Vol. 10252. SPIE. 2017. 102520V https://doi.org/10.1117/12.2275309
Arita, Yoshihiko ; Mazilu, Michael ; Chen, Mingzhou ; Vettenburg, Tom ; Aunõn, Juan M. ; Wright, Ewan M ; Dholakia, Kishan. / Dynamics of optically levitated microparticles in vacuum placed in 2D and 3D optical potentials possessing orbital angular momentum. Optical Manipulation Conference. Vol. 10252 SPIE, 2017.
@inproceedings{fa28e6bfd6da46bb8fedab1922ba6353,
title = "Dynamics of optically levitated microparticles in vacuum placed in 2D and 3D optical potentials possessing orbital angular momentum",
abstract = "We demonstrate the transfer of orbital angular momentum to optically levitated microparticles in vacuum [1]. We prepare two-dimensional and three-dimensional optical potentials. In the former case the microparticle is placed within a Laguerre-Gaussian beam and orbits the annular beam profile with increasing angular velocity as the air drag coefficient is reduced. We explore the particle dynamics as a function of the topological charge of the levitating beam. Our results reveal that there is a fundamental limit to the orbital angular momentum that may be transferred to a trapped particle, dependent upon the beam parameters and inertial forces present. This effect was predicted theoretically [2] and can be understood considering the underlying dynamics arising from the link between the magnitude of the azimuthal index and the beam radius [3]. Whilst a Laguerre-Gaussian beam scales in size with azimuthal index ', recently we have created a {"}perfect{"} vortex beam whose radial intensity profile and radius are both independent of topological charge [4, 5]. As the Fourier transform of a perfect vortex yields a Bessel beam. Imaging a perfect vortex, with its subsequent propagation thus realises a complex three dimensional optical field. In this scenario we load individual silica microparticles into this field and observe their trajectories. The optical gradient and scattering forces interplay with the inertial and gravitational forces acting on the trapped particle, including the rotational degrees of freedom. As a result the trapped microparticle exhibits a complex three dimensional motion that includes a periodic orbital motion between the Bessel and the perfect vortex beam. We are able to determine the three dimensional optical potential in situ by tracking the particle. This first demonstration of trapping microparticles within a complex three dimensional optical potential in vacuum opens up new possibilities for fundamental studies of many-body dynamics, mesoscopic entanglement [6, 7], and optical binding [8, 9].",
keywords = "Laguerre-Gaussian beam, Levitated optomechanics, Orbital angular momentum, Perfect vortex",
author = "Yoshihiko Arita and Michael Mazilu and Mingzhou Chen and Tom Vettenburg and Aun{\~o}n, {Juan M.} and Wright, {Ewan M} and Kishan Dholakia",
year = "2017",
doi = "10.1117/12.2275309",
language = "English (US)",
volume = "10252",
booktitle = "Optical Manipulation Conference",
publisher = "SPIE",
address = "United States",

}

TY - GEN

T1 - Dynamics of optically levitated microparticles in vacuum placed in 2D and 3D optical potentials possessing orbital angular momentum

AU - Arita, Yoshihiko

AU - Mazilu, Michael

AU - Chen, Mingzhou

AU - Vettenburg, Tom

AU - Aunõn, Juan M.

AU - Wright, Ewan M

AU - Dholakia, Kishan

PY - 2017

Y1 - 2017

N2 - We demonstrate the transfer of orbital angular momentum to optically levitated microparticles in vacuum [1]. We prepare two-dimensional and three-dimensional optical potentials. In the former case the microparticle is placed within a Laguerre-Gaussian beam and orbits the annular beam profile with increasing angular velocity as the air drag coefficient is reduced. We explore the particle dynamics as a function of the topological charge of the levitating beam. Our results reveal that there is a fundamental limit to the orbital angular momentum that may be transferred to a trapped particle, dependent upon the beam parameters and inertial forces present. This effect was predicted theoretically [2] and can be understood considering the underlying dynamics arising from the link between the magnitude of the azimuthal index and the beam radius [3]. Whilst a Laguerre-Gaussian beam scales in size with azimuthal index ', recently we have created a "perfect" vortex beam whose radial intensity profile and radius are both independent of topological charge [4, 5]. As the Fourier transform of a perfect vortex yields a Bessel beam. Imaging a perfect vortex, with its subsequent propagation thus realises a complex three dimensional optical field. In this scenario we load individual silica microparticles into this field and observe their trajectories. The optical gradient and scattering forces interplay with the inertial and gravitational forces acting on the trapped particle, including the rotational degrees of freedom. As a result the trapped microparticle exhibits a complex three dimensional motion that includes a periodic orbital motion between the Bessel and the perfect vortex beam. We are able to determine the three dimensional optical potential in situ by tracking the particle. This first demonstration of trapping microparticles within a complex three dimensional optical potential in vacuum opens up new possibilities for fundamental studies of many-body dynamics, mesoscopic entanglement [6, 7], and optical binding [8, 9].

AB - We demonstrate the transfer of orbital angular momentum to optically levitated microparticles in vacuum [1]. We prepare two-dimensional and three-dimensional optical potentials. In the former case the microparticle is placed within a Laguerre-Gaussian beam and orbits the annular beam profile with increasing angular velocity as the air drag coefficient is reduced. We explore the particle dynamics as a function of the topological charge of the levitating beam. Our results reveal that there is a fundamental limit to the orbital angular momentum that may be transferred to a trapped particle, dependent upon the beam parameters and inertial forces present. This effect was predicted theoretically [2] and can be understood considering the underlying dynamics arising from the link between the magnitude of the azimuthal index and the beam radius [3]. Whilst a Laguerre-Gaussian beam scales in size with azimuthal index ', recently we have created a "perfect" vortex beam whose radial intensity profile and radius are both independent of topological charge [4, 5]. As the Fourier transform of a perfect vortex yields a Bessel beam. Imaging a perfect vortex, with its subsequent propagation thus realises a complex three dimensional optical field. In this scenario we load individual silica microparticles into this field and observe their trajectories. The optical gradient and scattering forces interplay with the inertial and gravitational forces acting on the trapped particle, including the rotational degrees of freedom. As a result the trapped microparticle exhibits a complex three dimensional motion that includes a periodic orbital motion between the Bessel and the perfect vortex beam. We are able to determine the three dimensional optical potential in situ by tracking the particle. This first demonstration of trapping microparticles within a complex three dimensional optical potential in vacuum opens up new possibilities for fundamental studies of many-body dynamics, mesoscopic entanglement [6, 7], and optical binding [8, 9].

KW - Laguerre-Gaussian beam

KW - Levitated optomechanics

KW - Orbital angular momentum

KW - Perfect vortex

UR - http://www.scopus.com/inward/record.url?scp=85025670252&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85025670252&partnerID=8YFLogxK

U2 - 10.1117/12.2275309

DO - 10.1117/12.2275309

M3 - Conference contribution

AN - SCOPUS:85025670252

VL - 10252

BT - Optical Manipulation Conference

PB - SPIE

ER -