Wolfgang Löffler Lab - Solid State and High Dimensional Quantum Optics
Advancing the understanding of the interaction of light and matter on the single-quantum level is important for near-future quantum technologies but also to answer fundamental questions.
One major research topic is solid-state quantum optics with micro-cavities, which enable a very efficient interaction of single photons and single solid-state quantum dots. This is useful, for instance, for the development of deterministic single-photon and entangled-photon sources, in contrast to conventional probabilistic methods.
Another topic is the investigation of multi-photon entanglement in higher dimensions: Here, the single particle is not a qubit, but a quNit, which carries more quantum information, corresponding to a large alphabet classically compared to the traditional zero or one.
News
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A suitcase containing a quantum light source: QuanTour visits Leiden -
Can humans observe a single particle of light? (And what does that say about our brain?) -
This is how physicists use light to build complex structures -
Researchers from Leiden University have received awards in Nationaal Groeifonds Quantum Technology programme -
Light particles lined up one after the other -
LION in lockdown -
FET Open Grant for Many Photon Entanglement -
Leiden involved in three out of five Physics Vrije Programma grants -
Physicists demonstrate new method to make single photons -
Light manipulated with large artificial atom
Key publications
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Snijders H.J., Frey J.A., Norman J., Flayac H., Savona V., Gossard A.C., Bowers J.E., Exter M.P. van, Bouwmeester D. & Löffler W. (2018), Observation of the Unconventional Photon Blockade, Physical Review Letters 121(4): 043601.
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Snijders H.J., Frey J.A., Norman J., Post V.P., Gossard A.C., Bowers J.E., Exter M.P. van, Löffler W. & Bouwmeester D. (2018), Fiber-Coupled Cavity-QED Source of Identical Single Photons, Physical Review Applied 9(3): 031002.
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Snijders H.J., Frey J.A., Norman J., Bakker M.P., Langman E.C., Gossard A., Bowers J.E., Exter M.P. van, Bouwmeester D. & Löffler W. (2016), Purification of a single-photon nonlinguarity, NATURE COMMUNICATIONS 8(7): 12578.
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Hiesmayr B.C., Dood M.J.A. de & Löffler W. (2016), Observation of Four-Photon Orbital Angular Momentum Entanglement, Physical Review Letters 116(7): 073601.