Magnetically controlled exciton transfer in hybrid quantum-dot-quantum-well nanostructures

Author(s):Show less -

Laurindo Jr, V ; Mazur, Yu, I ; de Oliveira, E. R. Cardozo ; Alen, B. ; Ware, M. E. ; Marega Jr, E. ; Zhuchenko, Z. Ya ; Tarasov, G. G. ; Marques, G. E. ; Teodoro, M. D. ; Salamo, G. J.

• Document type: Journal article
• Source: PHYSICAL REVIEW B; v. 100, n. 3, p. 6-pg., 2019-07-19.

Abstract

A magnetophotoluminescence study of the carrier transfer with hybrid InAs/GaAs-quantum-dot-InGaA-squantum-well structures is carried out where we observe an unusual dependence of the photoluminescence (PL) on the GaAs barrier thickness at strong magnetic field and excitation density. For the case of a thin barrier the quantum-well (QW) PL intensity is observed to increase at the expense of a decrease in the quantum-dot (QD) PL intensity. This is attributed to changes in the interplane carrier dynamics in the QW and the wetting layer (WL) resulting from increasing the magnetic field along with changes in the coupling between QD excited states and exciton states in the QW and the WL. (AU)

• FAPESP's process: 13/18719-1 - Electronic carriers dynamics in semiconductor nanostructures
• Grantee: Marcio Daldin Teodoro
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 14/19142-2 - Characterization and processing of semiconductor nanostructures and application as devices
• Grantee: Gilmar Eugenio Marques
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 18/01914-0 - Functionalizing the optical emission in quantum tunneling nanostructures in different spectral intervals
• Grantee: Marcio Daldin Teodoro
• Support Opportunities: Regular Research Grants
• FAPESP's process: 14/07375-2 - Multi-user equipment approved in grant 2013/18719-1: time resolved measurement system
• Grantee: Marcio Daldin Teodoro
• Support Opportunities: Multi-user Equipment Program