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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2018
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Benchmarking five numerical simulation techniques for computing resonance wavelengths and quality factors in photonic crystal membrane line defect cavities

de Lasson, Jakob Rosenkrantz ; Frandsen, Lars Hagedorn ; Gutsche, Philipp ; Burger, Sven ; Kim, Oleksiy S. ; Breinbjerg, Olav ; Ivinskaya, Aliaksandra ; Wang, Fengwen ; Sigmund, Ole ; Häyrynen, Teppo ; Lavrinenko, Andrei ; Mørk, Jesper ; Gregersen, Niels
in: Optics Express (ISSN: 1094-4087), vol: 26, issue: 9, pages: 11366-11392, 2018

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2018     |    DOI: http://dx.doi.org/10.1364/OE.26.011366

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Giant nonlinear interaction between two optical beams via a quantum dot embedded in a photonic wire

Nguyen, H.A. ; Grange, T. ; Reznychenko, B. ; Yeo, I. ; de Assis, P.L. ; Tumanov, D. ; Fratini, F. ; Malik, N. S. ; Dupuy, E. ; Gregersen, Niels ; Auffeves, A. ; Gérard, J-M. ; Claudon, J. ; Poizat, Jean-Philippe
in: Physical Review B (Condensed Matter and Materials Physics) (ISSN: 1098-0121), vol: 97, 2018

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2018     |    DOI: http://dx.doi.org/10.1103/PhysRevB.97.201106

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High quality factor GaAs microcavity with buried bullseye defects

Winkler, K. ; Gregersen, Niels ; Häyrynen, Teppo ; Bradel, B. ; Schade, A. ; Emmerling, M. ; Kamp, M. ; Höfling, S. ; Schneider, C.
in: Physical Review Materials (ISSN: 2475-9953), vol: 2, issue: 5, 2018

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2018     |    DOI: http://dx.doi.org/10.1103/PhysRevMaterials.2.052201

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Intrinsic and environmental effects on the interference properties of a high-performance quantum dot single-photon source

Gerhardt, Stefan ; Iles-Smith, Jake ; McCutcheon, Dara ; He, Yu-Ming ; Unsleber, Sebastian ; Betzold, Simon ; Gregersen, Niels ; Mørk, Jesper ; Höfling, Sven ; Schneider, Christian
in: Physical Review B (Condensed Matter and Materials Physics) (ISSN: 1098-0121), vol: 97, 2018

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2018     |    DOI: http://dx.doi.org/10.1103/PhysRevB.97.195432

2017
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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 of the Optical Society of America A (ISSN: 0740-3232), vol: 34, issue: 9, pages: 1632-1641, 2017

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2017     |    DOI: http://dx.doi.org/10.1364/JOSAA.34.001632

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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: Physical Review B (ISSN: 2469-9950), vol: 96, issue: 12, 2017

Type: Journal article (Peer reviewed)

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

 

On the Theory of Coupled Modes in Optical Cavity-Waveguide Structures

Kristensen, Philip Trøst ; de Lasson, Jakob Rosenkrantz ; Heuck, Mikkel ; Gregersen, Niels ; Mørk, Jesper
in: Journal of Lightwave Technology (ISSN: 0733-8724), vol: 35, issue: 19, pages: 4247-4259, 2017

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2017     |    DOI: http://dx.doi.org/10.1109/JLT.2017.2714263

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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: Physical Review Applied (ISSN: 2331-7019), vol: 8, issue: 5, 2017

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2017     |    DOI: http://dx.doi.org/10.1103/PhysRevApplied.8.054022

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Ultralow power all-optical switch

Nguyen, H. ; Grange, T. ; Reznychenko, B. ; Yeo, I. ; De Assis, P. ; Tumanov, D. ; Fratini, F. ; Malik, N. ; Dupuy, E. ; Gregersen, Niels ; Auffèves, A. ; Gérard, J. ; Claudon, J. ; Poizat, J.
in: arXiv, 2017

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2017

2016
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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: Physical Review Letters (ISSN: 0031-9007), vol: 116, 2016

Type: Journal article (Peer reviewed)

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