Dr. Mathieu Mivelle
Research Fellow, Sorbonne University
Dr. Mivelle’s research lies within the field of nanophotonics and centers around investigations into the interactions between light and matter on the nanoscale to increase understanding of optical properties.
Dr. Mivelle explains, ‘Most current technologies make use of the electric field component of light, however, my research investigates the interaction of the magnetic optical field component with matter, which is much weaker’.
Dr. Mivelle designs structures that are patterned at the nanoscale, and couples these to single quantum emitters, such as single fluorescent molecules or lanthanide doped nanocrystals to produce physical effects between the two that are not found in nature. This spatial coupling permits Dr. Mivelle to modify the quantum properties of the emitters which could provide new opportunities in photonics for technological applications.
Dr. Mivelle uses a custom set up that consists of an inverted microscope, on top of which is a near field scanning probe, not unlike those used in AFM, but with the nanopatterned structure attached.
The nanostructure is brought into close proximity (~10 nm) to the sample consisting of nanocrystals, 50 nm in diameter, doped with rare earth lanthanide ions, such as erbium and europium, which are used in many technologies. Lanthanides are known to be very dim emitters in terms of photon counts, Dr. Mivelle explained, ‘I require a very sensitive camera to be able to locate these single emitters during sample scanning at speed’.
In order to couple the nanostructure to the single emitters, Dr. Mivelle must first locate them in the sample during scanning over tens of milliseconds, which provides a challenge in terms of speed and sensitivity.
We compared [the Prime 95B] with other EMCCD technologies and, for our application, the Prime 95B was the best.