Terahertz oscillation of resonant tunneling diodes with deep and thin quantum wells

Resonant Tunneling Diodes for Sub-Terahertz and Terahertz Oscillators

THz resonant-tunneling diodes

Coherence of resonant-tunneling transport in terahertz quantum-cascade lasers

We develop simple density-matrix models to describe the role of coherence in resonant-tunneling RT transport of quantum-cascade lasers QCLs . Specifically, we investigate the effects of coherent coupling between the lasing levels with other levels on the transport properties and gain spectra. In the first part of the paper, we use a three-level density-matrix model to obtain useful analytical e...

Resonant-tunneling diodes with emitter prewells

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Photo-Detectors Integrated with Resonant Tunneling Diodes

We report on photo-detectors consisting of an optical waveguide that incorporates a resonant tunneling diode (RTD). Operating at wavelengths around 1.55 μm in the optical communications C band we achieve maximum sensitivities of around 0.29 A/W which is dependent on the bias voltage. This is due to the nature of RTD nonlinear current-voltage characteristic that has a negative differential resis...