Project description DEENESFRITPL Perovskite quantum dots: key quantum emitters of single, pure photons Quantum information could spur breakthroughs in quantum communication, quantum key distribution and quantum computation. Quantum emitters that can generate single photons and pairs of entangled photons on demand are key to the development of such technologies. Perovskite quantum dots (PQDs) hold great potential for use as quantum emitters, but the lack of stable two-photon photoluminescence signals and the low biexciton photoluminescence quantum yields limit their use. Funded by the Marie Skłodowska-Curie Actions programme, the QESPEM project will investigate nanoscale plasmon–exciton (plexciton) interactions. The presence of plexciton states could significantly stabilise and improve the photoluminescence properties of PQDs, rendering them suitable for producing single, pure photons. Show the project objective Hide the project objective Objective The emerging field of quantum information offers significant opportunities in quantum key distribution, quantum simulation and computation, metrology, and imaging. However, these applications require the use of quantum emitters that can generate single photons and pairs of entangled photons on demand. Perovskite quantum dots (PQDs), which can produce a highly coherent single-photon emission, are very promising as quantum emitters with a high single-photon purity, indistinguishability, and brightness. A unique property of PQDs is that, in contrast to many other emitters, biexciton states can be effectively generated in PQD. Two-photon photoluminescence (PL) resulting from biexciton recombination is one of effective ways of generating entangled photon pairs. However, the use of the full potential of PQDs as quantum emitters is hindered by the limitations associated with the instability of the PL signal and the low biexciton PL quantum yield. Nanoscale plasmon–exciton interaction can significantly stabilize and improve the PL properties of PQDs due to the appearance of hybrid plasmon–exciton (plexciton) states serving as quantum emitters, thus overcoming the aforementioned limitations of PQDs. The main goal of the present QESPEM project is to design highly efficient plexcitonic quantum emitters operating as on-demand sources of pure single indistinguishable photons and pairs of entangled photons. To achieve this goal, the following objectives will be fulfilled: (1) to design quantum emitters based on the PQDs and plasmon nanostructures with implemented synergistic combination of plasmon-induces effects; (2) to develop new approaches and methods to control different regimes of plasmon–exciton interaction in the designed structures; (3) to optimize the conditions of light–matter coupling to achieve the highest values of the generation efficiency, single-photon purity, and indistinguishability for the single-photon mode and entanglement fidelity for the photon-pair mode. Fields of science natural sciencescomputer and information sciencescomputer securitycryptographynatural sciencesphysical sciencestheoretical physicsparticle physicsphotons Keywords Quantum emitter light-matter coupling nanohybrid material plasmon-exciton plasmon nanoparticle quantum dot perovskite nanoparticle single-photon emission entangled photons quantum tomography Programme(s) H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions Main Programme H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility Topic(s) MSCA-IF-2020 - Individual Fellowships Call for proposal H2020-MSCA-IF-2020 See other projects for this call Funding Scheme MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF) Coordinator UNIVERSIDAD DEL PAIS VASCO/ EUSKAL HERRIKO UNIBERTSITATEA Net EU contribution € 172 932,48 Address BARRIO SARRIENA S N 48940 Leioa Spain See on map Region Noreste País Vasco Bizkaia Activity type Higher or Secondary Education Establishments Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 172 932,48
