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Abstract
Optically induced mechanical torque driving rotation of small objects requires the presence of absorption or breaking cylindrical symmetry of a scatterer. A spherical nonabsorbing particle cannot rotate due to the conservation of the angular momentum of light upon scattering. Here, we suggest a novel physical mechanism for the angular momentum transfer to nonabsorbing particles via nonlinear light scattering. The breaking of symmetry occurs at the microscopic level manifested in nonlinear negative optical torque due to the excitation of resonant states at the harmonic frequency with higher projection of angular momentum. The proposed physical mechanism can be verified with resonant dielectric nanostructures, and we suggest some specific realizations.
Keywords
General Physics and Astronomy, UNIAXIAL ANISOTROPIC SPHERE, 2ND-HARMONIC GENERATION, RADIATION TORQUE, PARTICLES, FORCE, LEVITATION, TWEEZERS, ATOMS, MANIPULATION, CONFINEMENT

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MLA
Toftul, Ivan, et al. “Nonlinearity-Induced Optical Torque.” PHYSICAL REVIEW LETTERS, vol. 130, no. 24, 2023, doi:10.1103/physrevlett.130.243802.
APA
Toftul, I., Fedorovich, G., Kislov, D., Frizyuk, K., Koshelev, K., Kivshar, Y., & Petrov, M. (2023). Nonlinearity-induced optical torque. PHYSICAL REVIEW LETTERS, 130(24). https://doi.org/10.1103/physrevlett.130.243802
Chicago author-date
Toftul, Ivan, Gleb Fedorovich, Denis Kislov, Kristina Frizyuk, Kirill Koshelev, Yuri Kivshar, and Mihail Petrov. 2023. “Nonlinearity-Induced Optical Torque.” PHYSICAL REVIEW LETTERS 130 (24). https://doi.org/10.1103/physrevlett.130.243802.
Chicago author-date (all authors)
Toftul, Ivan, Gleb Fedorovich, Denis Kislov, Kristina Frizyuk, Kirill Koshelev, Yuri Kivshar, and Mihail Petrov. 2023. “Nonlinearity-Induced Optical Torque.” PHYSICAL REVIEW LETTERS 130 (24). doi:10.1103/physrevlett.130.243802.
Vancouver
1.
Toftul I, Fedorovich G, Kislov D, Frizyuk K, Koshelev K, Kivshar Y, et al. Nonlinearity-induced optical torque. PHYSICAL REVIEW LETTERS. 2023;130(24).
IEEE
[1]
I. Toftul et al., “Nonlinearity-induced optical torque,” PHYSICAL REVIEW LETTERS, vol. 130, no. 24, 2023.
@article{01HQ85GRJX7ADYJ5DC8V6FR2TN,
  abstract     = {{Optically induced mechanical torque driving rotation of small objects requires the presence of absorption or breaking cylindrical symmetry of a scatterer. A spherical nonabsorbing particle cannot rotate due to the conservation of the angular momentum of light upon scattering. Here, we suggest a novel physical mechanism for the angular momentum transfer to nonabsorbing particles via nonlinear light scattering. The breaking of symmetry occurs at the microscopic level manifested in nonlinear negative optical torque due to the excitation of resonant states at the harmonic frequency with higher projection of angular momentum. The proposed physical mechanism can be verified with resonant dielectric nanostructures, and we suggest some specific realizations.}},
  articleno    = {{243802}},
  author       = {{Toftul, Ivan and Fedorovich, Gleb and Kislov, Denis and Frizyuk, Kristina and Koshelev, Kirill and Kivshar, Yuri and Petrov, Mihail}},
  issn         = {{0031-9007}},
  journal      = {{PHYSICAL REVIEW LETTERS}},
  keywords     = {{General Physics and Astronomy,UNIAXIAL ANISOTROPIC SPHERE,2ND-HARMONIC GENERATION,RADIATION TORQUE,PARTICLES,FORCE,LEVITATION,TWEEZERS,ATOMS,MANIPULATION,CONFINEMENT}},
  language     = {{eng}},
  number       = {{24}},
  pages        = {{8}},
  title        = {{Nonlinearity-induced optical torque}},
  url          = {{http://doi.org/10.1103/physrevlett.130.243802}},
  volume       = {{130}},
  year         = {{2023}},
}

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