Dissipative Parametric Gain in a GaAs/AlGaAs Superlattice in PHYSICAL REVIEW LETTERS

New study is published in the journal “Physical Review Letters” from American Physical Society in the field of parametric generation of EM oscillations in GHz-THz frequency range. The work reports on the first observation of the dissipative parametric generation in a subcritically doped GaAs/AlGaAs superlattice (SL) subjected to a DC bias and a microwave pump. It enforces excitation of slow electrostatic waves in the SL that provide a significant enhancement of the gain coefficient.

The findings foresee the development of a miniature solid-state parametric generators of GHz-THz frequencies operating at room temperature.

Sketch of the parametric generation in the SL device.

DOI: 10.1103/PhysRevLett.128.236802