Abstract
Negative luminescence (NL) and positive luminescence in terahertz frequencies were observed from a compensated p -type Ge under various levels of pulse excitations at cryogenic temperatures. The NL spectra accompanying an S -type negative differential resistance phenomenon were attributed to the reduced emission transitions from the excited states to the ground states of the acceptors during the excitation. A possible excitation mechanism is also presented according to the measured data.
Original language | English |
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Article number | 241106 |
Journal | Applied Physics Letters |
Volume | 91 |
Issue number | 24 |
DOIs | |
State | Published - 20 Dec 2007 |