The quantum-dot cellular automata (QCA) computational paradigm provides a means to achieve ultimately low limits of power dissipation by replacing binary coding in currents and voltages with single-electron switching within arrays of quantum dots (‘‘cells’’). Clocked control over the cells allows the realization of power gain, memory and pipelining in QCA circuits. We present an experimental de...

We report on the analysis of thermally-limited operation of quantum-dot infrared photodetectors ~QDIPs!. A device model is developed and used to calculate the QDIP detectivity as a function of the structural parameters, temperature, and applied voltage, as well as to determine the conditions for the detectivity maximum. The QDIP detectivity is compared with that of quantum-well infrared photode...

To make photonic quantum information a reality1,2, a number of extraordinary challenges need to be overcome. One challenge is to achieve large arrays of reproducible ‘entangled’ photon generators, while maintaining compatibility for integration with optical devices and detectors3–5. Semiconductor quantum dots are potentially ideal for this as they allow photons to be generated on demand6,7 with...

We investigate low temperature transport in 200 3 200 arrays of GaAs quantum dots in which coupling between dots and electron density is controlled by a single gate. Current-voltage curves obey a power law above a threshold voltage with exponent ,1.5, and show discontinuous and hysteretic jumps in the current, or “switching events.” Multiple switching events result in a hierarchy of hysteresis ...

References We investigate the use of nanoelectronic structures in cellular nonlinear network (CNN) architectures, for future high-density and low-power CMOS-nanodevice hybrid circuits. We present simulation results for Single Electron Tunneling (SET) transistors configured as a voltage-to-current transducer for CNN cells. We also present an example of quantum-dot cellular arrays which may be us...