Niels Gregersen

Niels Gregersen is a Professor and Group Leader of the Quantum Light Sources group at the Department of Electrical and Photonics Engineering, Technical University of Denmark (DTU), and a member of the Center for Quantum Technologies. His research focuses on nanophotonics, quantum dots, and single-photon sources for quantum information and cryptography. He develops simulation methods for Maxwell’s equations in nanoscale structures, collaborating with European universities on experimental facilities.

His work addresses optical properties of nanostructures like nanowires and micropillars, with applications in LED technology and quantum photonics. Key projects include the LOQIT initiative (http://www.loqit.fotonik.dtu.dk), advancing quantum light sources through deterministic fabrication and phonon engineering. Gregersen supervises multiple PhD students in quantum photonics and has authored over 214 publications.

Research interests span quantum dots, photonic crystal cavities, and phonon effects in quantum emitters. Recent publications emphasize high-purity single-photon sources, phonon-assisted excitation in WSe₂, and innovative cavity designs like the 'hourglass' structure. His contributions bridge theoretical modeling and experimental implementation, advancing quantum communication and cryptography technologies.

• Supervised Students: Metuh P, Paralikis A, Piccinini C, Madigawa A.A., Gunnarsson C.P.
• Major Projects: Quantum dot-based single-photon sources, micropillar cavity optimization, strain-engineered emitters.
• Labs/Teams: Quantum Light Sources Group, DTU Center for Quantum Technologies.