Single polarized-photon emitters based on pyramidal III-nitride quantum dots

Project funded by Swedish Research Council (Project grant), grant 2016-04010_VR. Participating organisations named by the source: Linköping University. Funded amount: SEK 3,600,000, as stated by the source. Runs 2017-01-01 to 2020-12-31. 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 2025-12-06); national funding data, not CORDIS. Abstract given by the source: Pyramidal quantum dots (QDs) based on III-nitride semiconductors will serve as an almost ideal source to produce efficient and linearly polarized light. The unique properties of the III-nitrides will be exploited: (i) the electronic structure, where even a small anisotropy results in a high degree of linear polarization (ii) the wide spectral range to be reached by nitride alloys and (iii) the considerable barriers favorable for elevated temperature operation.Linearly polarized single photons will be emitted in a contained way from asymmetric InGaN or InN QDs positioned on top of elongated and deterministic (In)GaN micro-pyramids. The direction of the linear polarization of the emission can be predetermined from the growth.We aim at developing a light emitter based on one individual QD per pyramid, with possible dynamic control down to single photons. To realize ”photons-on-demand”, an external electrical pulse will trigger an electron to be injected into the dot. By employment of graphene contacts, both the transparency needed for low photon loss and high electron mobility for fast electrical pulses can be achieved. The quality of the single-photon statistics, based on excitonic emission from the pyramidal QDs, will be determined by photon correlation measurements.With a successful realization of the single-photon emitter, the same concept can be extended for multi-photon purposes, with manifold applications, e.g. for recognition purposes and optical interconnects.

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 3,600,000, focuses on single polarized-photon emitters using pyramidal III-nitride quantum dots. It runs from January 1, 2017, to December 31, 2020, involving Linköping University. Suggested technology pillar: sensing. Generated by AI from the public source text; it may contain errors and the original source is authoritative.