Investigation of the femtosecond inverse Faraday effect using paramagnetic Dy3 Al5 O12
Physical Review B - Condensed Matter and Materials Physics 81:10 (2010)
Abstract:
Pump-probe experiments on the rare-earth paramagnet Dy3Al 5O12 demonstrate that coupling between light and magnetism on the subpicosecond time scale cannot be adequately described by the thermodynamic model of the inverse Faraday effect but instead must be described microscopically by stimulated magneto-Raman scattering. Light-induced paramagnetic resonance, predicted by the thermodynamic theory, is not observed in Dy3Al5O12, however, the formation of a coherent superposition between other magnetic sublevels of the Dy3+ -ion's ground-state multiplet is measured. It is shown that coherence can only be induced between magnetic levels which are connected by the Raman selection rules. © 2010 The American Physical Society.Acoustic oscillator with electronic feed-back including non-linear control
(2010)
Abstract:
An acoustic oscillator arrangement includes an acoustic system having at least one acoustic transmission path through it, and at least one mode. The acoustic transmission path is of variable length. A controller is provided with an amplifier and a feedback network which together provide a positive …All-linear time reversal by a dynamic artificial crystal
NATURE COMMUNICATIONS 1 (2010) ARTN 141
Delay-line self-oscillator
(2010)
Abstract:
An electrical, magnetic or electromagnetic delay line self oscillator is described with a delay line arrangement, an oscillator control circuitry, and a frequency selection impedance connecting the delay line arrangement and the oscillator control circuitry and presenting an impedance to the delay …Mechanical oscillator
(2010)