Intense Ultrafast Pulse Propagation
A high power beam propagating in the medium can undergo a complex spatio-temporal evolution due to the interplay of dispersion, diffraction, and nonlinear effects such as self-focusing and ionization-induced refraction. We investigate experimentally the propagation dynamics in gases, bulk materials, and gas-filled hollow fibers at near-infrared and mid-infrared wavelengths, and we perform numerical simulations to predict or to explain novel phenomena.
Optical Frequency Combs
Ultra-Low Power Light-Matter Interactions
Intense nonlinear light interactions is often accompanied by the need for intense lasers, resulting in a high energy budget meanwhile prohibiting the utilization of quantum properties of photons. In this lab, we develop systems that combine resonant atomic gases with nanoscale photonic structures, where the hybridization of strong material response with strong geometric confinement breeds forcible few photon induced nonlinear interactions.
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Nonlinear optical processes involve interactions between photons of different frequencies and their creation / annihilation can be studied via their quantum correlations. Our research is devoted to translating some of our realizations in nonlinear optics to the single photon level. Applications include quantum key distribution, optical quantum computing, quantum simulator circuits.
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