Research

Light-matter interactions not only lie in the heart of extremely rich physics but can also be harvested with great potential for applications ranging from all optical logic circuits and on-chip quantum information processing, to cryptography and quantum metrology.
The Experimental Quantum Nanoscience Lab specializes in three particular research topics:

Physics and applications of polariton condensates in microcavities

  • All-optical control of polariton fluids
  • Novel topological entities and topologically protected computing
  • Emulation of complex systems using polariton condensates

Solid-state quantum systems for quantum information and nanophotonics

  • Coherent qubit control in scalable quantum emitter platforms: Site-controlled quantum-dots and silicon-vacancies in diamond
  • Enhanced light-matter interactions at single quantum level
  • Nanophotonic applications with III-V materials and diamond

Hybrid polariton-quantum dot platforms for scalable quantum hardware

  • Development / investigation of a hybrid Polariton / Quantum dot system
  • Use of excitonic quantum nonlinearities for scalable single / two qubit gates
  • Development of fundamental components for on-chip quantum processors
Artistic take on the coherent control setup

Collaborations

Würzburg University, Germany


Oldenburg University, Germany


Tyndall National Institute, Ireland


Stanford University, United States


Experimental capabilities

Liquid He free (closed cycle) operation of magnetic cryostat for microscopy.
14h cooldown and 48h warmup time, 6.5K sample temperature 0-5T at 0.75T/min
Standard and non standard magnetic field orientations (0°, and 60°-90°).
Low vibrations ( max ~7.0nm RMS in all directions)


Picosecond pulsed Ti:Sapphire laser & monomode CW Ti:Sapphire laser Custom built frequency stabilized HeNe laser for actively stabilized interferometry.


Custom built, double, 1m long monochromator with motorized intermediate 30mm-wide slits and dual exit.
2 x 1800lines/mm gratings, 50% efficiency at full resolution ~8.5 μeV



Integrated scanning confocal microscopy setup, fully functional under maximum magnetic field.
60% efficient with respect to free space setup.



Custom built advanced optomechanical modules and motorized optomechanics for computer automation and precision optics manipulation.



Pulse autocorrelator, high precision wavemeter, timing electronics, single photon counting modules, and lots of other gadgets…