Carrier storage time of milliseconds at room temperature in self-organized quantum dots

Abstract

sowohl optische als auch elektrische Ladungsträgerinjektion in die Quantenpunkte. Obwohl diese Ansätze erfolgreich den Speichereffekt in quantenpunktbasierten Speicherstrukturen demonstrierten, ist eine Kombination aus elektrischer und optischer Ansteuerung der Speicherzelle mit erheblichem technologischen Aufwand verbunden. Ein rein elektrischer Zugriff auf die Speicherfunktionen gilt als unumgänglich für eine industrielle Weiterentwicklung einer Speicherzelle auf Basis von Quantenpunkten. Speicherstrukturen, die diese Anforderung erfüllen, wurden von Balocco et al. 8 , Nataraj et al. 9 und 8 [8]: C.

540-meV Hole Activation Energy for GaSb/GaAs Quantum Dot Memory Structure Using AlGaAs Barrier

“…Under a reverse bias, the discharging of the QDs is a process in which all the confined holes emit out of the dots due to thermal activation. The thermal emission rate of holes is e p [14], [15] …”

Photonic switching devices based on semiconductor nano-structures

“…While a variety of QD-based photonic devices including lasers [31,32], optical amplifiers [33,34], optical memories [35,36] and switches [17,37] have been successfully demonstrated, their dense integration has been hindered by intrinsic material problems. The two most significant of these are: (1) the inhomogeneous broadening of optical spectra which is a natural consequence of self-assembly, (2) the small cross-section and short interaction length of QDs when interacting with light.…”

Charge spectroscopy of Si nanocrystals in a SiO2 matrix

“…Following other papers in which quantum-dot parameters were extracted by DLTS [4,5], we assume here that the rate of carrier emission from a trap is e = τ m -1 ~ σT 2 exp(-E a /kT), where σ is the carrier capture cross-section of the trap, k is the Boltzmann constant, and T is the measurement temperature. Each peak was observed in a broad temperature range, making it possible to extract from the Arrhenius plots shown in Fig.…”