Time-resolved photoluminescence of two-dimensional hot carriers in GaAs-AlGaAs heterostructures
Physical Review Letters 53:19 (1984) 1841-1844
Abstract:
We have studied the picosecond time dependence of luminescence from a two-dimensional electron system following absorption of an ultrashort light pulse. From our measurements we determine the temporal evolution of the carrier temperature, finding that the cooling of hot carriers is suppressed by a factor 60 below that predicted on a three-dimensional nondegenerate-electron model. Additionally, we determine the electron-hole radiative life-time and invoke a hole trap to explain shortened luminescence lifetimes at low carrier densities. © 1984 The American Physical Society.Time-resolved spectroscopy of semiconductor quantumwell hueterostructures
Physica B+C 127:1-3 (1984) 343-348
Abstract:
Recent progress in transient absorption and luminescence studies of multiple quantum well (MQW) structures is reviewed. Hot-carrier relaxation has been studied in both undoped and modulation doped samples. Confinement of excitons in narrow wells has recently been detected by measuring a large reduction in the exciton lifetime. Finally, the evidence for nonradiative processes is discussed. © 1984 Elsevier Science Publishers B.V.TIME-RESOLVED PHOTOLUMINESCENCE OF TWO-DIMENSIONAL HOT CARRIERS IN GAAS-ALGAAS HETEROSTRUCTURES
PHYSICAL REVIEW LETTERS 53:19 (1984) 1841-1844
Picosecond studies of luminescence of cis polyacetylene
Journal of Physics C: Solid State Physics 16:20 (1983)
Abstract:
The authors find that the lifetime of the 1.9 eV luminescence of cis-polyacetylene isPHOTOTHERMAL DETECTION OF PICOSECOND PHOTOINDUCED DICHROISM.
Journal de Physique (Paris), Colloque 44:10 (1983)