Objective
Research objectives and content
It is well documented that the possibility of stabilising excitons at room temperature in semiconductor heterostructures is a key factor for high performance optoelectronic devices. This should be realised via the suppression of the exciton-phonon scattering. It is the main part of this research project to study the basic properties of the exciton-phonon coupling in low dimensional structures. The proposal takes advantage of the unique physical properties of ZnS, where the 3D exciton binding energy is close to that of the LO phonon, and so, in quantum wells structures, excitations of the free exciton can be tuned to smaller, larger or resonant with the LO phonon energy. The non-local and local exciton-phonon complexes as well as the exciton-phonon scattering will be investigated by mean of absorption, photoluminescence excitation, two-photon and magneto-optical spectroscopies. In particular, the application of an electric field in a Schottky structure will allow the exciton binding energy to be tuned through the LO phonon energy via the quantum confined Stark effect. The results will be used to explore phonon scattering suppression in a demonstrator structure.
Training content (objective, benefit and expected impact)
The proposed project will allow the applicant to undergo training in the use of new spectroscopy techniques (magneto-optical and two photon absorption). Previous work (see curriculum vitae) has allowed me to investigate the electron-phonon coupling when a carrier is bound to a doping impurity. The extension to the study of the exciton-phonon complex, which has additional internal degrees of freedom will give me a better knowledge of the properties these kind of quasiparticles. Furthermore, this is a novel basic physics proposal which will provide the applicant with the means to explore new optoelectronic devices and to contribute to the development of high gain UV lasers for industrial use.
Links with industry / industrial relevance (22)
Fields of science (EuroSciVoc)
- natural sciences physical sciences condensed matter physics quasiparticles
- natural sciences physical sciences atomic physics
- natural sciences physical sciences electromagnetism and electronics semiconductivity
- natural sciences physical sciences theoretical physics particle physics photons
- natural sciences physical sciences optics spectroscopy
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)
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.
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
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Data not available
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
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.
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.
Coordinator
EH14 4AS Edinburgh
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.