Journal
APPLIED PHYSICS LETTERS
Volume 84, Issue 19, Pages 3924-3926Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1741037
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We report on a semiconductor-superlattice frequency multiplier for the generation of submillimeter waves. A monochromatic microwave-pump field (frequency near 100 GHz) periodically excited a superlattice into states of negative differential conductivity giving rise to space-charge domain creation and annihilation joint with a nonsinusoidal high-frequency current and radiation at harmonics of the pump field. A highly doped GaAs/AlAs superlattice allowed the conversion of pump to third-harmonic radiation at 300 GHz with an efficiency of about 1% (powersimilar to30 muW). (C) 2004 American Institute of Physics.
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