Objective
Since the prediction and discovery of the exciton, the fundamental problem of the nature of exciton creation, relaxation and recombination remains unclear. Recent studies in quantum size heterostructures based on II-VI compounds, ultrathin quantum wells, quantum wires and quantum dots based on II-V compounds have emphasised the importance of hot excitons, such as correlated energy relaxation of an electron-hole pairs, in the optical spectra. Moreover, in the case of an electron-hole pair created inside a quantum dot, hot exciton relaxation is naturally the only possible energy relaxation process.
So far there has been no systematic study of the efficiency of hot exciton creation, relaxation and recombination in different types of quantum wells, quantum wires and quantum dots of various geometry and materials.
The overall aim of this project is to carry out a systematic experimental and theoretical study of exciton formation and relaxation in low-dimensional heterostructures.
The specific objectives of the project are: to determine the importance of electron-phonon coupling in hot exciton relaxation process in quantum wells and deduce electron-phonon coupling parameters; to determine the impact of interface disorder, QW thickness and interface structure on hot electron processes and deduce optimised structures for maximum and for minimum impact effect on these; to understand the role of system symmetry by studying GaAs-AlAs quantum wells grown on differently oriented substrates under conditions where no corrugation is present to yield the optimised surfaces for well controlled hot electron processes; to study the quantum efficiency of hot electron processes under two conditions: electrical carrier injection and high optical excitation-lasing-conditions with a view to exploring the relevant properties of the device; to understand the role of lateral confinement and exciton localisation in hot exciton process and in exciton stability, aiming at realising the maximum oscillator strength in radiative recombination.
Fields of science (EuroSciVoc)
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Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
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Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
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Coordinator
G12 8TR GLASGOW
United Kingdom
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.