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In this paper, the fluctuation properties of phonons after the optical excitation of a quantum dot with an ultrashort laser pulse are studied theoretically. When a single pulse with pulse area π creates an exciton in the system, a coherent phonon state builds up. Fluctuations of coherent states are time independent and equal to the vacuum fluctuations. By an excitation with a π/2 pulse a superposition...
Proper scaling of single chip measurements to module-level is an important task during the development of power semiconductor chips. In this paper it is shown how different the comparison between the reverse recovery behaviour of diodes in a conventional IGBT module and of the diode-mode of RC-IGBT can be on chip-level and on module level. The reason for these differences is, that in a conventional...
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