Thermal equilibrium spin torque: Near-field radiative angular momentum transfer in magneto-optical media
arXiv:2012.03193 · doi:10.1103/PhysRevB.103.125424
Abstract
Spin and orbital angular momentum of light plays a central role in quantum nanophotonics as well as topological electrodynamics. Here, we show that the thermal radiation from finite-sized bodies comprising of nonreciprocal magneto-optical materials can exert a spin torque even in global thermal equilibrium. Moving beyond the paradigm of near-field heat transfer, we calculate near-field radiative angular momentum transfer between finite-sized nonreciprocal objects by combining Rytov's fluctuational electrodynamics with the theory of optical angular momentum. We prove that a single magneto-optical cubic particle in non-equilibrium with its surroundings experiences a torque in the presence of an applied magnetic field (T-symmetry breaking). Furthermore, even in global thermal equilibrium, two particles with misaligned gyrotropic axes experience equal magnitude torques with opposite signs which tend to align their gyrotropic axes parallel to each other. Our results are universally applicable to semiconductors like InSb (magneto-plasmas) as well as Weyl semi-metals which exhibit the anomalous Hall effect (gyrotropy) at infrared frequencies. Our work paves the way towards near-field angular momentum transfer mediated by thermal fluctuations for nanoscale devices.
arXiv comment15 pages, 8 figures
References in corpus (43)
- Spin-orbit interactions of light
- Spin Transfer Torques
- Broadband super-Planckian thermal emission from hyperbolic metamaterials
- Optically Levitated Nanodumbbell Torsion Balance and GHz Nanomechanical Rotor
- Axion-Field-Enabled Nonreciprocal Thermal Radiation in Weyl Semimetals
- Ultrasensitive torque detection with an optically levitated nanorotor
- Torsional optomechanics of a levitated nonspherical nanoparticle
- Trace formulae for non-equilibrium Casimir interactions, heat radiation and heat transfer for arbitrary objects
- Non-equilibrium electromagnetic fluctuations: Heat transfer and interactions
- Conservation of the spin and orbital angular momenta in electromagnetism
- Magnetic-field control of near-field radiative heat transfer and the realization of highly tunable hyperbolic thermal emitters
- Super-Planckian Near-Field Thermal Emission with Phonon-Polaritonic Hyperbolic Metamaterials
- Large nonreciprocal absorption and emission of radiation in type-I Weyl semimetals with time reversal symmetry breaking
- Giant tunable nonreciprocity of light in Weyl semimetals
- Photon thermal Hall effect
- Observing of the super-Planckian near-field thermal radiation between graphene sheets
- Fluctuational-electrodynamic theory and dynamics of heat transfer in multiple dipolar systems
- Rotational Quantum Friction
- Vacuum friction in rotating particles
- Fluctuating surface-current formulation of radiative heat transfer: theory and applications
- Fluctuating surface-current formulation of radiative heat transfer for arbitrary geometries
- The Thermal Discrete Dipole Approximation (T-DDA) for near-field radiative heat transfer simulations in three-dimensional arbitrary geometries
- Giant thermal magnetoresistance in plasmonic structures
- Impacts of propagating, frustrated and surface modes on radiative, electrical and thermal losses in nanoscale-gap thermophotovoltaic power generators
- Fluctuating volume-current formulation of electromagnetic fluctuations in inhomogeneous media: incandecence and luminescence in arbitrary geometries
- Universal spin-resolved thermal radiation laws for nonreciprocal bianisotropic media
- Thermal discrete dipole approximation for the description of thermal emission and radiative heat transfer of magneto-optical systems
- Approaching the Standard Quantum Limit of Mechanical Torque Sensing
- Detecting Casimir torque with an optically levitated nanorod
- Radiative Heat Transfer between Neighboring Particles
- Thermal rectification and spin-spin coupling of non-reciprocal localized and surface modes
- Non-trivial topological structure of heat and momentum flux radiated by magneto-optical nanoparticles
- Thermal spin photonics in the near-field of nonreciprocal media
- Convergence analysis of the thermal discrete dipole approximation
- Quantum gyro-electric effect: Photon spin-1 quantization in continuum topological bosonic phases
- Casimir torque between nanostructured plates
- Circularly polarized thermal radiation from nonequilibrium coupled antennas
- Fluctuation-induced torque on a topological insulator out of thermal equilibrium
- Green-Kubo relation for thermal radiation in non-reciprocal systems
- Spinning Radiation from Topological Insulator
- Electron g-factor engineering for non-reciprocal spin photonics
- Light with orbital angular momentum interacting with trapped ions
- A Single Gyrotropic Particle as a Heat Engine
Cited by in corpus (5)
- Transport in electron-photon systems
- Trace Expressions and Associated Limits for Non-Equilibrium Casimir Torque
- Microscopic theory of photon-induced energy, momentum, and angular momentum transport in the nonequilibrium regime
- Casimir force among spheres made of Weyl semimetals breaking Lorentz reciprocity
- Broadband circularly polarized thermal radiation from magnetic Weyl semimetals