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We report on a novel micro-heater integrated dual mode multisection laser as a optical beat source for tunable continuous-wave THz generation. The beat frequency from this dual-mode multisection laser is continuously tuned from 0.10 to 0.57 THz.
The magnetization reversal is investigated in (Ga,Mn)As thin films using magneto-optical Kerr effect. The results demonstrate a reversal behavior analogous to that observed in metallic magnetic layers (coherent rotation followed by nucleation propagation process). The dynamic study at T=20K shows a strong increase of the coercivity with the increase of dH/dt.
Summary form only given. Recently, non-degenerate inter-level interactions caused by Coulomb correlations have been studied by using partially non-degenerate four-wave mixing. The most important signature of this interaction was the existence of strong coherent emission at the exciton resonance even when the first pulse (/spl omega//sub 1/) excites continuum that is non overlapping to the exciton...
Summary form only given. We show that the generation mechanism of coherent phonons in a quasi two dimensional GaAs/AlGaAs multiple quantum well structure is mainly the impulsive stimulated Raman scattering (ISRS). This is in sharp contrast with bulk GaAs, where ISRS plays only a minor role, if any. In addition, interference between the allowed and the forbidden Raman scattering plays an important...
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