Geometrical control of the interatomic coulombic decay process in quantum dots for infrared photodetectors

Modeling of High Temperature GaN Quantum Dot Infrared Photodetectors

In this paper, we present calculations for different parameters of quantum dot infrared photodetectors. We considered a structure which includes quantum dots with large conduction-band-offset materials (GaN/AlGaN). Single band effective mass approximation has been applied in order to calculate the electronic structure. Throughout the modeling, we tried to consider the limiting factors which dec...

Time-resolved spectroscopy of multiexcitonic decay in an InAs quantum dot

The multiexcitonic decay process in a single InAs quantum dot is studied through high-resolution timeresolved spectroscopy. A cascaded emission sequence involving three spectral lines is seen that is described well over a wide range of pump powers by a simple model. The measured biexcitonic decay rate is about 1.5 times the single-exciton decay rate. This ratio suggests the presence of selectio...

Characterization of InSb quantum dots in InAs matrix grown by molecular beam epitaxy for infrared photodetectors

Recombination properties of Si-doped InGaAs/GaAs quantum dots

The recombination properties of directly doped InGaAs/GaAs quantum dots (QDs) for application in quantum dot infrared photodetectors (QDIPs) have been investigated by time-resolved photoluminescence. Compared with undoped and barrier-doped samples, the overall effect of direct dot doping is found to be small, resulting in only slight deterioration of dot homogeneity. Low-temperature photolumine...

Insight into performance of quantum dot infrared photodetectors

In the paper, an algorithm for theoretical evaluation of dark and illumination characteristics of quantum dot infrared photodetectors (QDIPs) is presented. The developed algorithm is based on a model previously published by Ryzhii and co-workers. In our considerations it is assumed that both thermionic emission and field-assisted tunnelling mechanisms determine the dark current of quantum dot d...