Bimodal distribution of Indium composition in arrays of low-pressure metalorganic-vapor-phase-epitaxy grown InGaAs/GaAs quantum dots

Abstract

Laser irradiation effects on the CdTe/ZnTe quantum dot structure studied by Raman and AFM spectroscopy J. Appl. Phys. 112, 063520 (2012) Single photon emission in the red spectral range from a GaAs-based self-assembled quantum dot Appl. Phys. Lett. 101, 103108 (2012) Structural characterization of CdSe/ZnS quantum dots using medium energy ion scattering Appl. Phys. Lett. 101, 023110 (2012) The conduction band absorption spectrum of interdiffused InGaAs/GaAs quantum dot infrared photodetectors J. Appl. Phys. 111, 123719 (2012) Site-controlled formation of InAs/GaAs quantum-dot-in-nanowires for single photon emitters

Interdot carrier's transfer via tunneling pathway studied from photoluminescence spectroscopy

“…The histogram of the QD lateral size ( Fig. 1) clearly shows this bimodal size distribution [6,14]. Note that the family of SQDs has an enormous concentration as compared with the larger ones (Table 1).…”

Evolution of a multimodal distribution of self-organizedInAs∕GaAsquantum dots

“…Occasionally a bimodal distribution is found for specific growth parameters. [8][9][10][11] For InAs/ GaAs layer deposition near the critical value of elastic relaxation to self-organized QDs, a multimodal QD distribution with up to five well-distinguished subensembles was concluded from clearly resolved narrow peaks observed in the photoluminescence ͑PL͒ of the QD ensemble. 12,13 Employing antimony as a surfactant, recently an even more pronounced breakdown was found.…”

Photoluminescence probing of non-radiative channels in hydrogenated In(Ga)As/GaAs quantum dots

“…1(b)). We know from our earlier studies using TEM and PL measurements that the QDs distribution in the samples studied here is bimodal [4,14]. The 300 K ground transition PLlines of the two QDs populations are, respectively, centered at 0.96 eV (pop.…”