Bias-tunable quantum disc-in-nanowire photonic crystal IR detectors

Project funded by Swedish Research Council (Project grant), grant 2018-04722_VR. Participating organisations named by the source: Halmstad University. Funded amount: SEK 3,930,000, as stated by the source. Runs 2019-01-01 to 2022-12-31. 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: High-performance photodetectors for infrared radiation (IR) are key components in applications e.g. thermal imaging, surveillance, reflectography and optical (quantum) communication. This proposal deals with fundamental understanding and development of disruptive three-terminal (wrap-gated) nanowire (NW) array IR detectors with voltage-tunable photoresponse enhanced by strong photonic crystal modes. Incoming photons are absorbed in InAsP quantum discs (QDiscs) embedded in InP NWs, surrounded by transparent ITO/HfO2 wrap-gates. Applying a bias to the wrap-gate changes the Fermi-level inside the NWs, which in turn govern the complex optical transitions underlying the output detector signal.The main aims of this proposal are: - Fundamental studies of photoresponse in Fermi-level-tunable NW photodetectors- Designed absorption enhancement by photonic crystal engineering2-year goals:- Realized two-terminal QDiscs-in-NW array detectors with waveguide- Realized wrap-gated QDiscs-in-NW array detectors- Developed realistic photodetector models using COMSOL an k·p methods4-year goals:-Proof-of-concept wrap-gated QDiscs-in-NW broadband photodetectors with optical amplification-Developed fundamental understanding of optical effects related to a bias-tunable refractive index in confined nanostructures.The project involves experts in nanophotonics and materials science from Halmstad University (HU) and NanoLund@Lund University. The PI, prof H. Pettersson, is at HU and NanoLund.

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 "Bias-tunable quantum disc-in-nanowire photonic crystal IR detectors" is funded by the Swedish Research Council with a grant of SEK 3,930,000, running from January 1, 2019, to December 31, 2022, involving Halmstad University. Suggested technology pillar: sensing. Generated by AI from the public source text; it may contain errors and the original source is authoritative.