Abstract
The superradiant character of submillimeter-wave emission from optically excited electronic Bloch oscillations in a GaAs/(Formula presented)(Formula presented)As superlattice is investigated by time-resolved terahertz emission spectroscopy. The intensity of the radiation and its decay time are studied as a function of the density of excited charge carriers. From the measured emission efficiency, the spatial amplitude of the charge oscillations is estimated.
Original language | English |
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Pages (from-to) | R14325-R14328 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 54 |
Issue number | 20 |
DOIs | |
State | Published - 1996 |