Optical Mapping of Nonequilibrium Charge Carriers

Author(s)

Castro, E. D. Guarin ^[1] ; Pfenning, A. ^{[2, 3]} ; Hartmann, F. ^{[2, 3]} ; Knebl, G. ^{[2, 3]} ; Teodoro, M. Daldin ^[1] ; Marques, G. E. ^[1] ; Hoefling, S. ^{[2, 3]} ; Bastard, G. ^[4] ; Lopez-Richard, V ^[1]

Affiliation

^[1] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Wurzburg, Rontgen Ctr Complex Mat Syst RCCM, D-97074 Wurzburg - Germany

^[3] Univ Wurzburg, Tech Phys, Phys Inst, D-97074 Wurzburg - Germany

^[4] Univ PSL Paris Sci & Lettres, Dept Phys, Ecole Normale Super Paris ENS, F-75005 Paris - France

• Document type: Journal article
• Source: Journal of Physical Chemistry C; v. 125, n. 27, p. 14741-14750, JUL 15 2021.
• Web of Science Citations: 0

Abstract

We investigate the energy relaxation segmentation in a resonant tunneling heterostructure by assessing the optical and transport dynamics of nonequilibrium charge carriers. The electrical and optical properties are analyzed using electronic transport measurements combined with electro- and photo-luminescence spectroscopies in continuous-wave mode. Our results suggest that hot electron and hole populations form independent nonequilibrium systems that do not thermalize among them and with the lattice. Consequently, the carrier effective temperature changes independently at different regions of the heterostructure, with a population distribution for holes colder than for electrons. (AU)

• 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
• 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: 14/02112-3 - Optical and transport phenomena in nano-devices
• Grantee: Victor Lopez Richard
• Support Opportunities: Regular Research Grants