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A high-density electron-hole plasma in InGaAs/GaAs quantum wells emits a series of sequential bursts of intense superfluorescent radiation with photon energies corresponding to the separation between the electron and hole quasi-Fermi energies.
We have performed ultrafast pump-probe and time-resolved photoluminescence experiments on highly excited semiconductor quantum wells in a high magnetic field, observing time-delayed suprefluorescence bursts of coherent radiation together with a sudden population drop from full inversion to zero.
Terahertz time-domain spectroscopy of a highly-aligned single-walled carbon nanotube film reveals strongly anisotropic responses. The deduced complex dynamic conductivity clearly showed a non-Drude-like frequency dependence, with the real part showing a peak at ∼ 4 THz.
This paper presents a suggestion of using the automatic understanding methods in a telescope guiding system, which is an example of the real-time system. In the presented approach the guiding system using the knowledge base is able to describe the time-varying situation and respond to it adequately. The description of the observation process is given by the sequence of some previously defined image...
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