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Wire-less sub-harmonic injection locking of a free running oscillator is presented. The free running oscillator consists of an InP-based triple barrier resonant tunneling diode integrated in a slot antenna designed for oscillation at f0 from 31 GHz to 35 GHz. The wire-less sub-harmonic injection locking signal is provided by a horn antenna to the slot antenna resonator of the fundamental mode RTD...
InP-based resonant tunneling diodes with symmetrical I/V-characteristics have shown their excellent high frequency performance for THz signal generation. For signal detection we present a device with an additional third barrier to create an unsymmetrical I/V-characteristic. Sensitivity measurements are performed and further improvements by scaling of the active device area are discussed. To allow...
We present an asymmetrical InP-based three barrier resonant tunneling diode with high current density. For positive bias voltages the device operates like a symmetrical resonant tunneling diode, providing a wide region of negative differential resistance. Under zero bias condition it can be used as a sensitive high frequency detector. The nonlinearity may also enable high frequency mixer applications.
InP-based resonant tunneling diodes with symmetrical I/V-characteristics have shown their excellent high frequency performance for THz signal generation. We present a modification with an additional third barrier to create an unsymmetrical I/V-characteristic. With their large current densities and low capacitances these devices are promising candidates for zero bias high frequency envelope detectors...
This paper presents an optimized RTD-HBT single ended voltage controlled oscillator topology with increased tuning range and improved frequency stability at 20 GHz oscillation frequency. By connecting the RTD to the emitter of an HBT, a larger voltage swing at the parallel resonator compared to the direct connection can be achieved. In addition the RTD-capacitance influence on the oscillation frequency...
Recently, heavy emitter doping rather than decreasing the barrier thickness has boosted the peak current density of resonant tunneling diodes (RTDs) above 1,000 kA/cm2. Based on this achievement very mature InP-based RTD with current densities above 500 kA/cm2 are nowadays the leading solid-state THz device [1, 2]. Here, we show that even triple-barrier RTD (TBRTD) devices now reach a current density...
Heterostructure n‐GaAs/InGaP/p‐GaAs core‐multishell nanowire diodes are synthesized by metal‐organic vapor‐phase epitaxy. This structure allows a reproducible, selective wet etching of the individual shells and therefore a simplified contacting of single nanowire p‐i‐n junctions. Nanowire diodes show leakage currents in a low pA range and at a high rectification ratio of 3500 (at ±1V). Pronounced...
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