Related Experiment Video
Updated: Aug 6, 2025

Magnetically Induced Rotating Rayleigh-Taylor Instability
Published on: March 3, 2017
The Rise of Toroidal Electrodynamics and Spectroscopy
Nikolay I Zheludev1,2,3, David Wilkowski2,4,5
1Optoelectronics Research Centre, University of Southampton, Southampton, SO17 1BJ, United Kingdom.
Abstract:
Toroidal electrodynamics is now massively influencing research in toroidal (Marinov et al. New J. Phys. 2007, 9, 234; Basharin et al. Phys. Rev. X 2015, 5, 011036; Jeong et al. ACS Photonics 2020, 7, 1699) and anapole metamaterials (Basharin et al. Phys. Rev. B 2017, 95, 035104; Wu et al. ACS Nano 2018, 12, 1920), optical properties of nanoparticles (Miroshnichenko et al. Nature Commun. 2015, 6, 8069; Gurvitz et al. Laser Photonics Rev. 2019, 13, 1800266), plasmonics (Ogut et al. Nano Lett. 2012, 12, 5239; Yezekyan et al. Nano Lett. 2022, 22, 6098), sensors (Gupta et al. Appl. Phys. Lett. 2017, 110, 121108; Ahmadivand et al. Mater. Today 2020, 32, 108; Wang et al. Nanophotonics 2021, 10, 1295; Yao et al. Photonix 2022, 3, 23), and lasers (Huang et al. Sci. Rep. 2013, 3, 1237; Hwang et al. Nanophotonics 2021, 10, 3599), while a recent publication on toroidal optical transitions in hydrogen-like atoms (Kuprov et al. Sci. Adv. 2022, 8, eabq7651) promises to launch a new chapter in spectroscopy. In this Viewpoint, we review these progresses.
Related Concept Videos
Toroids
When connected to a supply, the magnetic field generated in the toroid has field lines circular and concentric to its axis. Conventionally, the direction of this magnetic field is expressed using the right-hand rule. If the fingers of the right hand curl in the current direction, the thumb...
Divergence and Curl of Magnetic Field
Torque On A Current Loop In A Magnetic Field
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
Magnetic Vector Potential
Consider an ideal solenoid with n turns per unit length and radius R. If I is the current through the solenoid, the magnetic field inside the solenoid is expressed as the product of vacuum...
Maxwell's Equation Of Electromagnetism
Electromagnetic Waves in Matter
Consider the electromagnetic wave passing through a dielectric medium. In such a case, Maxwell's equations get modified. In Ampere's law, ε0 , the dielectric permittivity of free space is replaced with ε, the permittivity of dielectric. Also, the vacuum permeability μ0 is replaced by the permeability of the...

