Femtosecond intrapulse evolution of Faraday rotation

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Slow light is a phenomenon explained by low group velocity of the pulsed light. Faraday effect can be greatly enhanced in multilayered structures due to the artificial dispersion [1, 2]. Magnetophotonic crystals, as being layered nanostructures, can modulate electric filed amplitude and phase of a femtosecond pulse in time. For example, Faraday angle at the initial part of the pulse can differ from that at its tail, and from the steady-state value. In this work femtosecond dynamics of Faraday rotation is demonstrated experimentally in magnetophotonic crystals by polarization-sensitive correlation spectroscopy.

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