Speaker: Belotelov Vladimir Igorevich (Head of the scientific group of the Russian Quantum Center, associate professor at MSU)
Topic: Ultra-fast optical spin control in magnetic nanophoton structures.
Abstract: Fully dielectric nanostructures are very promising for effective spin management in magnetic materials using femtosecond laser impulses. Such structures with specially tailored parameters allow to achieve various optical resonances (optical waveguide modes, Mie modes, Fabry-Pérot resonance) in magnetics and, thus, the desired distribution of optical spin angular momentum (the effective magnetic field of the inverse Faraday and Cotton-Mouton magneto-optical effects) in the magnetic material, this ultimately leading to the excitation of various high-amplitude spin modes. In particular, in magnetophotonic crystals and nanostructured magnetic films, it is possible to excite standing spin waves confined in one or all three dimensions. In excited Mie optical resonances of magnetic nanospheres or nanocylinders, there is an opportunity to significantly reshape the local and inhomogeneous effective field of the inverse Faraday effect to excite high-order standing modes. On the other hand, by applying a non-magnetic nanostructure on a magnetic film, laser pulses excite ultrashort traveling spin waves with a length of about 100-200 nm, which is significantly smaller than the wavelength of light in magnetics. Alongside this, the use of nanophotonic structures allows to discover the new optomagnetic effects, such as the inverse equatorial Kerr effect, which greatly expands the range of functionality for spin management using light.

Secretary of the workshop: Yuryshev N.N.
Workshop principal: Velichansky V.L.
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