Study of characteristic filling time of traps in GaAs and InAs-QDs by analysis of photoreflectance spectra
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Keywords

Photoreflectance
Quantum dots
InAs
GaAs
Trap-filling time. Fotorreflectancia
Puntos cuánticos
InAs
GaAs
Tiempo de llenado de trampas.

How to Cite

Figueroa Reina, T., Sánchez Trujillo, D. J., Prías Barragán, J. J., Ariza Calderón, H., Pulzara, A., & López López, M. (2015). Study of characteristic filling time of traps in GaAs and InAs-QDs by analysis of photoreflectance spectra. Superficies Y Vacío, 28(1), 1-4. Retrieved from https://superficiesyvacio.smctsm.org.mx/index.php/SyV/article/view/120

Abstract

In this paper it is presented the study of trap-filling time in a GaAs single crystal and InAs Self-assembled quantum dots (SAQDs), using the analysis of the photoreflectance (PR) spectra measured at room temperature. The SAQDs were grown on a GaAs substrate by molecular beam epitaxy (MBE), and GaAs sample is a commercial single crystal. The PR spectra were measured varying the chopper frequency from 80 Hz to 3000 Hz. From the analysis of these PR spectra, it was obtained the dependence of the PR signal intensity with the modulation frequency. By fitting these experimental data, it was determined that the presence of the SAQDs increases the value of t.
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