Niels Gregersen

Niels Gregersen

Associate Professor

DTU FOTONIK
Department of Photonics Engineering

Quantum and Laser Photonics

Technical University of Denmark

Ørsteds Plads

Building 345A, room 274

2800 Kgs. Lyngby

Ph.
Fax +45 45 93 65 81
E-mail ngre@fotonik.dtu.dk
ORCID 0000-0002-8252-8989
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2017
 

Enhanced photon extraction from a nanowire quantum dot using a bottom-up photonic shell

Jeannin, Mathieu ; Cremel, Thibault ; Häyrynen, Teppo ; Gregersen, Niels ; Bellet-Amalric, Edith ; Nogues, Gilles ; Kheng, Kuntheak
in journal: Nano Letters (ISSN: 1530-6984), 2017

Type: Journal article (Peer reviewed)

Status: Submitted     |    Year: 2017

  PDF

Modeling open nanophotonic systems using the Fourier modal method: Generalization to 3D Cartesian coordinates

Häyrynen, Teppo ; Østerkryger, Andreas Dyhl ; de Lasson, Jakob Rosenkrantz ; Gregersen, Niels
in journal: Journal of the Optical Society of America A (ISSN: 0740-3232), 2017

Type: Journal article (Peer reviewed)

Status: Accepted/In press     |    Year: 2017

  PDF

Type-II quantum-dot-in-nanowire structures with large oscillator strength for optical quantum gate applications

Taherkhani, Masoomeh ; Willatzen, Morten ; Mørk, Jesper ; Gregersen, Niels ; McCutcheon, Dara P. S.
in journal: Physical Review B (ISSN: 2469-9950) (DOI: http://dx.doi.org/10.1103/PhysRevB.96.125408), vol: 96, issue: 12, 2017

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2017     |    DOI: http://dx.doi.org/10.1103/PhysRevB.96.125408

2016
  PDF

On-Demand Single Photons with High Extraction Efficiency and Near-Unity Indistinguishability from a Resonantly Driven Quantum Dot in a Micropillar

Ding, Xing ; He, Yu ; Duan, Z.-C. ; Gregersen, Niels ; Chen, M.-C. ; Unsleber, S. ; Maier, Sebastian ; Schneider, Christian ; Kamp, Martin ; Höfling, Sven ; Lu, Chao-Yang ; Pan, Jian-Wei
in journal: Physical Review Letters (ISSN: 0031-9007) (DOI: http://dx.doi.org/10.1103/PhysRevLett.116.020401), vol: 116, 2016

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2016     |    DOI: http://dx.doi.org/10.1103/PhysRevLett.116.020401

  PDF

A fiber-coupled quantum-dot on a photonic tip

Cadeddu, Davide ; Teissier, Jean ; Braakman, Floris R. ; Gregersen, Niels ; Stepanov, Petr ; Gérard, Jean Michel ; Claudon, Julien ; Warburton, Richard J. ; Poggio, Martino ; Munsch, Mathieu
in journal: Applied Physics Letters (ISSN: 0003-6951) (DOI: http://dx.doi.org/10.1063/1.4939264), vol: 108, 2016

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2016     |    DOI: http://dx.doi.org/10.1063/1.4939264

  PDF

Highly indistinguishable on-demand resonance fluorescence photons from a deterministic quantum dot micropillar device with 74% extraction efficiency

Gregersen, Niels
in journal: Optics Express (ISSN: 1094-4087) (DOI: http://dx.doi.org/10.1364/OE.24.008539), vol: 24, issue: 8, 2016

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2016     |    DOI: http://dx.doi.org/10.1364/OE.24.008539

  PDF

Spectral symmetry of Fano resonances in a waveguide coupled to a microcavity

Østerkryger, Andreas Dyhl ; de Lasson, Jakob Rosenkrantz ; Heuck, Mikkel ; Yu, Yi ; Mørk, Jesper ; Gregersen, Niels
in journal: Optics Letters (ISSN: 0146-9592) (DOI: http://dx.doi.org/10.1364/OL.41.002065), vol: 41, issue: 9, pages: 2065-2068, 2016

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2016     |    DOI: http://dx.doi.org/10.1364/OL.41.002065

  PDF

Open-geometry Fourier modal method: modeling nanophotonic structures in infinite domains

Häyrynen, Teppo ; de Lasson, Jakob Rosenkrantz ; Gregersen, Niels
in journal: Journal of the Optical Society of America A (ISSN: 0740-3232) (DOI: http://dx.doi.org/10.1364/JOSAA.33.001298), vol: 33, issue: 7, pages: 1298-1306, 2016

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2016     |    DOI: http://dx.doi.org/10.1364/JOSAA.33.001298

  PDF

A broadband tapered nanocavity for efficient nonclassical light emission

Gregersen, Niels ; McCutcheon, Dara ; Mørk, Jesper ; Gérard, Jean-Michel ; Claudon, Julien
in journal: Optics Express (ISSN: 1094-4087) (DOI: http://dx.doi.org/10.1364/OE.24.020904), vol: 24, issue: 18, pages: 20904-24, 2016

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2016     |    DOI: http://dx.doi.org/10.1364/OE.24.020904

2015
  PDF

Two-photon interference from a quantum dot-microcavity: Persistent pure-dephasing and suppression of time-jitter

Unsleber, Sebastian ; McCutcheon, Dara ; Dambach, Michael ; Lermer, Matthias ; Gregersen, Niels ; Hofling, Sven ; Mørk, Jesper ; Schneider, Christian ; Kamp, Martin
in journal: Physical Review B (Condensed Matter and Materials Physics) (ISSN: 1098-0121) (DOI: http://dx.doi.org/10.1103/PhysRevB.91.075413), vol: 91, issue: 7, pages: 075413, 2015

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2015     |    DOI: http://dx.doi.org/10.1103/PhysRevB.91.075413