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Title [sv]
Spänningsstyrda IR nanotrådsdetektorer med kvantsegment inbäddade i en fotonisk kristall
Title [en]
Bias-tunable quantum disc-in-nanowire photonic crystal IR detectors
Abstract [en]
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.
Principal InvestigatorPettersson, Håkan
Coordinating organisation
Halmstad University
2019-01-01 - 2022-12-31
National Category
Condensed Matter Physics
DiVA, id: project:211Project, id: 2018-04722_VR

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