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The optical gain dynamics in an InGaAs/AlInAs quantum cascade laser is studied by midinfrared pump-probe experiments and electro-optic sampling. We find an extremely fast gain recovery time of <1 ps.
Analyzing the electrical degradation of modern flash memory cells by conventional C-Vor charge pumping techniques is hardly possible due to the extremely small gate area. However, 1/f noise measurements can be done since low frequency 1/f noise in the range around 1 Hz produced by stress-generated oxide traps strongly increases in MOSFETs with shrinking area. Here we show that measurements of the...
The spin relaxation within the radiative doublet of the exciton ground state in InAs/GaAs quantum dots is studied via ultrafast spectral hole burning spectroscopy. A biexcitonic resonance emerges due to relaxation of the exciton spin.
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