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.

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Optical Frequency Combs

Guiding and confining light in micro- and nano-scale devices can greatly enhance the efficiency and bandwidth of nonlinear optical interactions. We investigate sub-micron silicon nitride optical waveguides and resonators as nonlinear optical elements for optical frequency comb generation.

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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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Optical Computing and Signal Processing

Our research involves the investigation of photonics based approaches for optical computing and signal-processing. We are developing all-optical techniques for all-optical computing, random number generation, and ultrafast signal processing.

 

Quantum Optics

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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