Single Photons – QuantumFrontiers – Leibniz Universität Hannover

The realization of single-photon sources with diverse materials and the applications quantum radiometry, quantum metrology and quantum communication.

Contributions to QuantumFrontiers

Collaboration for creating the best single-photon sources and required structures
Realisation of ultra-precise radiometric and photometric standards by single photon sources and detectors
Enablement of the control of electromagnetic fields at the single quantum level
Establishment of the Niedersachsen Quantum Link between LUH and PTB as a quantum communication testbed
Organization of a regular PhD seminar on Single Photons

Collaborative Innovation

Growing single-photon sources based on GaInN/GaN quantum dot pyramidal structures, micro-luminescence investigation and confocal microscopy on these samples (Kück PTB / Hangleiter TUBS)
Growing single-photon sources based on molecules, specifically the preparation of C60-molecules as protective layers for dibenzoterrylene (DBT) molecules and for embedding DBT into C60 molecules (Kück PTB / Schlickum TUBS)
Diamond structuring using Focused Ion Beam (FIB) methods (Kück, PTB / Etzkorn TUBS)
Establishing a quantum key distribution channel between LUH and PTB based on different protocols (Ding LUH / Kück PTB)
Investigating the properties of defects in hexagonal boron nitride. (Schell LUH / Kück PTB)
Advancing light extraction from quantum dots using hybrid antennas (Ding LUH / Kück PTB)
Developing and characterizing bright sources of single photons based on GaIn/GaN pyramid structures and GaAs/AlGaAs quantum dots (Kück PTB / Hangleiter TUBS)
Investigating the coupling of plasmonic nanostructures with GaAs/AlGaAs quantum dots grown close to the semiconductor surface (Chichkov, Schell LUH)
Growing and characterizing molecular photon sources (Voss, Schlickum TUBS)

Cooperations

SEQUME

Single- and entangled photon sources for quantum metrology

Research Alliance

QR.X - Quantenrepeater.Link

Cluster of Excellence

PhoenixD

Scientific Output

Publications

Christinck J, Hirt F, Hofer H, Liu Z, Etzkorn M, Dunatov T et al. Bright single-photon emission from a GeV center in diamond under a microfabricated solid immersion lens at room temperature. Journal of applied physics. 2023 Mai 21;133(19):193102. Epub 2023 Mai 16. doi: 10.1063/5.0150208

Christinck J, Rodiek B, López M, Georgieva H, Hofer H, Götzinger S et al. Comparison of back focal plane imaging of nitrogen vacancy centers in nanodiamond and core-shell CdSe/CdS quantum dots. Journal of Physics: Conference Series. 2022;2149(1):012014. doi: 10.1088/1742-6596/2149/1/012014

Kück S, López M, Hofer H, Georgieva H, Christinck J, Rodiek B et al. Single photon sources for quantum radiometry: a brief review about the current state-of-the-art. Applied Physics B: Lasers and Optics. 2022 Jan 23;128(2):28. doi: 10.1007/s00340-021-07734-2

Bruschi DE, Paraoanu GS, Fuentes I, Wilhelm FK, Schell AW. General solution of the time evolution of two interacting harmonic oscillators. Physical Review A. 2021 Feb 11;103(2):023707. doi: 10.1103/PhysRevA.103.023707

Bruschi DE, Chatzinotas S, Wilhelm FK, Schell AW. Spacetime effects on wavepackets of coherent light. Physical Review D. 2021 Okt 11;104(8):085015. doi: 10.1103/PhysRevD.104.085015

Cao X, Yang J, Li P, Zhang Y, Rugeramigabo EP, Brechtken B et al. Single photon emission from ODT passivated near-surface GaAs quantum dots. Applied physics letters. 2021 Jun 2;118(22):221107. doi: 10.1063/5.0046042

Georgieva H, López M, Hofer H, Kanold N, Kaganskiy A, Rodt S et al. Absolute calibration of a single-photon avalanche detector using a bright triggered single-photon source based on an InGaAs quantum dot. Optics express. 2021 Jul 19;29(15):430680. doi: 10.1364/OE.430680

Georgieva H, Meda A, Raupach SMF, Hofer H, Gramegna M, Degiovanni IP et al. Detection of ultra-weak laser pulses by free-running single-photon detectors: Modeling dead time and dark counts effects. Applied physics letters. 2021 Apr 26;118(17):174002. doi: 10.1063/5.0046014

Henning P, Sidikejiang S, Horenburg P, Bremers H, Rossow U, Hangleiter A. Unity quantum efficiency in III-nitride quantum wells at low temperature: Experimental verification by time-resolved photoluminescence. Applied physics letters. 2021 Jul 8;119(1):011106. doi: 10.1063/5.0055368

Krumbein L, Anggara K, Stella M, Michnowicz T, Ochner H, Abb S et al. Fast Molecular Compression by a Hyperthermal Collision Gives Bond-Selective Mechanochemistry. Physical review letters. 2021 Feb 1;126(5):056001. doi: 10.1103/PhysRevLett.126.056001

Rossow U, Sidikejiang S, Hagag S, Horenburg P, Henning P, de Vasconcellos Lourenco R et al. Pyramid Formation by Etching of In_xGa_1−xN /GaN Quantum Well Structures Grown on N-face GaN for Nanooptical Light Emitters. Physica Status Solidi (B) Basic Research. 2021 Okt 8;258(10):2100085. Epub 2021 Jul 20. doi: 10.1002/pssb.202100085

Tieben P, Shiyani B, Bahrami N, Schell AW. Spectroscopic Analysis of Defect Centers in hBN. in Proceedings of SPIE: Photonics for Quantum 2021: 12–16 July 2021 Online Only, United States. SPIE. 2021. 1184418. (Proceedings of SPIE - The International Society for Optical Engineering). doi: 10.1117/12.2600952

Christinck J, Rodiek B, López M, Hofer H, Georgieva H, Kück S. Characterization of the angular-dependent emission of nitrogen-vacancy centers in nanodiamond. Applied Physics B: Lasers and Optics. 2020 Okt 1;126(10):161. doi: 10.1007/s00340-020-07508-2

Georgieva H, López M, Hofer H, Christinck J, Rodiek B, Schnauber P et al. Radiometric characterization of a triggered narrow-bandwidth single-photon source and its use for the calibration of silicon single-photon avalanche detectors. METROLOGIA. 2020 Okt;57(5):055001. doi: 10.1088/1681-7575/ab9db6

Michnowicz T, Borca B, Pétuya R, Schendel V, Pristl M, Pentegov I et al. Controlling Single Molecule Conductance by a Locally Induced Chemical Reaction on Individual Thiophene Units. Angewandte Chemie - International Edition. 2020 Apr 1;59(15):6207-6212. Epub 2020 Jan 22. doi: 10.1002/anie.201915200

Wu X, Delbianco M, Anggara K, Michnowicz T, Pardo-Vargas A, Bharate P et al. Imaging single glycans. NATURE. 2020 Jun 18;582(7812):375-378. Epub 2020 Jun 17. doi: 10.1038/s41586-020-2362-1

Yang J, Nawrath C, Keil R, Joos R, Zhang X, Höfer B et al. Quantum dot-based broadband optical antenna for efficient extraction of single photons in the telecom O-band. Optics express. 2020 Jun 22;28(13):19457-19468. Epub 2020 Jun 17. doi: 10.1364/OE.395367

Zopf M, Keil R, Chen Y, Yang J, Chen D, Ding F et al. Entanglement Swapping with Semiconductor-Generated Photons Violates Bell's Inequality. Physical review letters. 2019 Okt 18;123(16):160502. Epub 2019 Okt 14. doi: 10.1103/PhysRevLett.123.160502, 10.15488/5545

TG Members

Involved Members and their Relevant Expertise

Members	Institution	Relevant Expertise
Stefan Kück	PTB	Single-photon sources and their metrological characterization and application
Boris Chichkov	LUH	Nanoscale materials processing
Uta Schlickum	TUBS	Light Excitation at the Single Molecular Level; Photon-STM investigations of III-V Semiconductors: growth and characterization of single photon sources
Fei Ding	LUH	Intensity-squeezed single photon sources based on quantum dots; Niedersachsen Quantum Link
Markus Etzkorn	TUBS	Advancing TEM characterization
Ilja Gerhardt	LUH	Development and implementation of optical systems for quantum technologies, quantum communication
Andreas Hangleiter	TUBS	Deterministic Quantum Dots
Michael Oestreich	LUH	Spin and charge carrier dynamics of complex semiconductor nanostructures
Andreas Schell	PTB/LUH	Spectroscopy and photonic integration of quantum emitters
Tobias Voss	TUBS	Molecular Quantum Emitters on GaN-based devices
Heiko Bremers	TUBS	Deterministic Quantum Dots
Marco López	PTB	single-photon metrology
Uwe Rossow	TUBS	Deterministic Quantum Dots
Ali Hreibi	PTB	Niedersachsen Quantum Link
Hristina Georgieva	PTB	Semiconductor quantum dot based single-photon sources
Beatrice Rodiek	PTB	Quantum radiometry
Michael Zopf	LUH	Semiconductor quantum dot based single-photon sources, Niedersachsen Quantum Link
Justus Christinck	PTB	Diamond-based single-photon sources
Franziska Hirt	PTB	Molecule- and semiconductor-based single-photon sources
Martin Kernbach	LUH/PTB	Optical trapping of nanoparticles
Chenxi Ma	LUH	Fabrication of quantum dot based single-photon sources
Leonora Meier	PTB	Characterization of single photon sources
Neda Noei	TUBS	Molecule-based single-photon sources
Andreas Reutter	TUBS	Characterization of single photon sources
Simon Spelthann	LUH	Semiconductor quantum dot based single-photon sources
Mike Stummvoll	TUBS	Characterization of single photon sources
Pablo Tieben	LUH/PTB	Spectroscopy of quantum emitters

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