Nanowire quantum dots as light sources for future quantum information applications

Project funded by Swedish Research Council (Project grant), grant 2013-05839_VR. Participating organisations named by the source: Lund University. Funded amount: SEK 3,336,000, as stated by the source. Runs 2014-01-01 to 2017-12-31. Keywords: Naturvetenskap, Natural Sciences, Fysik, Physical Sciences, Den kondenserade materiens fysik, Condensed Matter Physics. Source: OpenAIRE Graph, from the funder's project data (collected by OpenAIRE on 2025-12-05); national funding data, not CORDIS. Abstract given by the source: This project aims to create a source of single photons and entangled photon pairs in order to advance research on optical quantum information processing. I will use a new quantum dot (QD) system, the nanowire QD, which has shown great potential as being highly controllable. However, the nanowire QDs lack some properties which are fundamental for quantum information applications; entangled photon pair generation, coherent single photon emission and room temperature operation. In this proposal I outline a plan to solve these issues by exploiting the unique features of the nanowire QD system; controllable dimensions and strain situation as well as electrical and optical access to the QD from the side. In order to generate entangled photons the exciton fine structure splitting (FSS) will be minimised. A study of FSS as a function of QD dimensions and strain situation will be preformed. In addition external means of control, such as an electric field applied via contacts on the side facets of the nanowire, will also be used to minimise the FSS. The coherence of the light source will be improved by resonant optical excitation. I will study how the wave guiding properties of the nanowire can be utilised to achieve excitation and collection of the emission along orthogonal axes. Room temperature operation will be achieved by creating a QD of suitable size and material which is suitably strained to achieve strong enough confinement for the charge carriers.

Original source.

Source: OpenAIRE Graph: projects of national funders, OpenAIRE, from the project data of Swedish Research Council. Retrieved 2026-10-28. Licence: Creative Commons Attribution 4.0 (OpenAIRE Graph). Selected metadata, adapted presentation; the publisher's record is authoritative. No endorsement by the source is implied. Licence: Creative Commons Attribution 4.0 (CC BY 4.0).

AI-assisted summary: The project, funded by the Swedish Research Council with SEK 3,336,000, aims to develop nanowire quantum dots as sources of single photons and entangled photon pairs for optical quantum information processing from 2014 to 2017. Suggested technology pillar: computing. Generated by AI from the public source text; it may contain errors and the original source is authoritative.