Radiation torques exerted on a sphere by focused Laguerre-Gaussian beams

Yu, Huachao; She, Weilong

doi:10.1103/physreva.92.023844

Cited by 6 publications

(3 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Scattering of arbitrary fields is described using the generalized Lorenz-Mie theory (GLMT) [15,16], which relies on the decomposition of the incident field in terms of vector multipoles [17][18][19][20] and the fulfillment of boundary conditions through the use of the appropriate T-matrix [12][13][14][15]. Past treatments of the scattering of focused * rgutier2@ur.rochester.edu electromagnetic fields [20][21][22][23][24][25][26][27][28] provide a variety of models for optical tweezers. These models differ from each other primarily in how the focused incident field is described: through field matching [20][21][22], through use of the Richards-Wolf diffraction theory (c.f., [6,29,30]) to focus a paraxial beam by an optical element [23][24][25], or via an ad-hoc extension of paraxial beams to the nonparaxial electromagnetic regime [26][27][28]31].…”

Section: Introductionmentioning

confidence: 99%

“…Past treatments of the scattering of focused * rgutier2@ur.rochester.edu electromagnetic fields [20][21][22][23][24][25][26][27][28] provide a variety of models for optical tweezers. These models differ from each other primarily in how the focused incident field is described: through field matching [20][21][22], through use of the Richards-Wolf diffraction theory (c.f., [6,29,30]) to focus a paraxial beam by an optical element [23][24][25], or via an ad-hoc extension of paraxial beams to the nonparaxial electromagnetic regime [26][27][28]31]. In all these treatments, the expressions for the coefficients of the vector multipoles in the beam decomposition are typically not analytic; i.e., computation of these expressions requires numerical integration.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Lorenz-Mie scattering of focused light via complex focus fields: An analytic treatment

2018

View full text Add to dashboard Cite

The Lorenz-Mie scattering of a wide class of focused electromagnetic fields off spherical particles is studied. The focused fields in question are constructed through complex focal displacements, leading to closed-form expressions that can exhibit several interesting physical properties, such as orbital and/or spin angular momentum, spatially-varying polarization, and a controllable degree of focusing. These fields constitute complete bases that can be considered as nonparaxial extensions of the standard Laguerre-Gauss beams and the recently proposed polynomials-of-Gaussians beams. Their analytic form turns out to lead also to closed-form expressions for their multipolar expansion. Such expansion can be used to compute the field scattered by a spherical particle and the resulting forces and torques exerted on it, for any relative position between the field's focus and the particle.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lorenz-Mie scattering of focused light via complex focus fields: An analytic treatment

2018

View full text Add to dashboard Cite

show abstract

“…In this paper, we give detailed analytical expressions to describe the evolution rules of both SAM and OAM in the aperture by analyzing the waveguide modes with the vector angular spectrum [31,32] of the electromagnetic field. According to the conservation of AM [30,[33][34][35][36][37][38][39][40][41], an optical torque force arises during the propagation. We present the relationship between the total AM and the optical torque.…”

Section: Introductionmentioning

confidence: 99%

Evolution dynamics of optical angular momentum and torque through a birefringent metallic subwavelength aperture

Li¹,

Liu²,

Gao³

et al. 2019

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

The interaction of light and matter results in the transfer of linear momentum and angular momentum (AM) which induces optical force and torque, respectively. It is revealed that the linear momentum and AM are conserved for a system of matter and electromagnetic field. In this paper, we present a waveguide-mode analysis to show the dynamic evolution rules for both longitudinal and transverse angular momenta in a metallic subwavelength aperture with different symmetries. In addition, we demonstrate the relationship between AM and optical torque that is based on the AM conservation of light and the metallic subwavelength aperture. Accompanying with the change of AM is the existence of non-zero optical torque, which is promising for dynamic optical manipulation in nanoscale. We believe that unveiling such phenomenon is conducive to the further development of the angular-momentum-based optical mechanics in subwavelength aperture.

show abstract

James Clerk Maxwell: Life and science

Marston

2016

Journal of Quantitative Spectroscopy and Radiative Transfer

View full text Add to dashboard Cite

Maxwell's life and science are presented with an account of the progression of Maxwell's research on electromagnetic theory. This is appropriate for the International Year of Light and Light-based Technologies, 2015. Maxwell's own confidence in his 1865 electromagnetic theory of light is examined, along with some of the difficulties he faced and the difficulties faced by some of his followers. Maxwell's interest in radiation pressure and electromagnetic stress is addressed, as well as subsequent developments. Some of Maxwell's other contributions to physics are discussed with an emphasis on the kinetic and molecular theory of gases. Maxwell's theistic perspective on science is illustrated, accompanied by examples of perspectives on Maxwell and his science provided by his peers and accounts of his interactions with those peers. Appendices examine the peer review of Maxwell's 1865 electromagnetic theory paper and the naming of the Maxwell Garnett effective media approximation and provide various supplemental perspectives. From Maxwell's publications and correspondence there is evidence he had a high regard for Michael Faraday. Examples of Maxwell's contributions to electromagnetic terminology are noted.

show abstract

Radiation torques exerted on a sphere by focused Laguerre-Gaussian beams

Cited by 6 publications

References 69 publications

Lorenz-Mie scattering of focused light via complex focus fields: An analytic treatment

Lorenz-Mie scattering of focused light via complex focus fields: An analytic treatment

Evolution dynamics of optical angular momentum and torque through a birefringent metallic subwavelength aperture

James Clerk Maxwell: Life and science

Contact Info

Product

Resources

About