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SUMMARY:MechE Colloquium: Versatile light generation and manipulation in e
 ngineered nonlinear optical waveguides
DTSTART:20210420T121500
DTEND:20210420T131500
DTSTAMP:20260509T115323Z
UID:412c322165a2f14d154e7ea68be9cff1b006deecf465a4f5e7c8a5a0
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Camille Brès\, Photonic Systems Laboratory (PHOSL)\, EP
 FL School of Engineering (STI)\, Institute of Electrical Engineering (IEL)
 \nAbstract:\nNonlinear optics describes the behaviour of light in a nonlin
 ear medium\, exploiting higher orders of the material susceptibility. It a
 llows us to\, for example\, change the colour of a light beam\, change its
  shape and or process light with light. Nonlinear optical phenomena are th
 e basis of many devices used in optical communication systems\, optical se
 nsing or material research. They also enable a wide range of novel applica
 tions\, from time keeping\, to searching for exoplanet or quantum computin
 g. The need for the integration of nonlinear functionalities to the wavegu
 ide or chip scale is evident: it is the only path towards optical signal p
 rocessing devices that are portable\, compact\, power efficient and user-f
 riendly.\n\nIn this talk\, we present our approaches for improving the eff
 iciency and versatility of optical nonlinear effects in waveguiding system
 . We will describe how leveraging intrinsic material properties combined w
 ith optimized waveguide geometries and system’s engineering can enhance 
 the performance of devices used for light generation or signal processing 
 [1]. We show how microstructures\, either in fibers or integrated designs\
 , provide a powerful method for shaping a favourable dispersion landscape 
 necessary for controlling nonlinear interactions and opening new possibili
 ties in terms of sensing\, quantum and light generation [2-4]. We will als
 o explain how novel nonlinear functionalities can be introduced in silicon
 -photonic platforms [5\,6] and conclude with some outlook on further chall
 enges and possibilities.\n\n[1] S. Xing\, D. Grassani\, S. Kharitonov\, A.
  Billat\, C-S Brès\, ‘Characterization and modeling of microstructured 
 chalcogenide fibers for efficient mid-infrared wavelength conversion\,’ 
 Optics Express 24 (9)\, 9741-9750 (2016)\n\n[2] S. Xing\, et al.\, ‘Mid-
 infrared continuous-wave parametric amplification in chalcogenide microstr
 uctured fibers\,’ Optica 4 (6)\, 643-648 (2017)\n\n[3] E. Nitiss\, O. Ya
 kar\, A. Stroganov\, C.-S. Brès\, ‘Highly tunable second-harmonic gener
 ation in all-optically poled silicon nitride waveguides\, Optics letters 4
 5 (7)\, 1958-1961 (2020)\n\n[4] D. Grassani\, et al.\, ‘Mid infrared gas
  spectroscopy using efficient fiber laser driven photonic chip-based super
 continuum\,’ Nature Communications 10 (1)\, 1-8 (2019)\n\n[5] A. Billat\
 , et al.\, ‘Large second harmonic generation enhancement in Si3N4 wavegu
 ides by all-optically induced quasi-phase-matching\,’ Nature Communicati
 ons 8 (1)\, 1-7 2017 (2017)\n\n[6] E. Nitiss\, T. Liu\, D. Grassani\, M. P
 feiffer\, T.J. Kippenberg\, C.-S. Brès\, ‘Formation Rules and Dynamics 
 of Photoinduced χ(2) Gratings in Silicon Nitride Waveguides\,’ ACS Phot
 onics 7 (1)\, 147-153 (2019)\n\n\nBio:\nCamille-Sophie Brès is an associa
 te professor at EPFL in the institute of Electrical Engineering. She recei
 ved her bachelor degree with honors in EE from McGill University\, Canada\
 , in 2002. She then moved to the USA where she obtained her PhD in EE from
  Princeton University in 2006. After a post-doctoral position at the Unive
 rsity of California San Diego she joined EPFL as a tenure track professor 
 and director of the Photonic Systems Laboratory in 2011. Her work focusses
  on leveraging and enhancing nonlinear processes in optical waveguides for
  the optimization of all-optical signal processing\, light generation and 
 sensing by exploiting dispersion engineering\, material properties\, and a
 rchitectural features. She was awarded the early career Women in Photonics
  Award from the European Optical Society in 2016\, as well as ERC starting
  (2012)\, Consolidator (2017) and Proof of Concept (2019) grants.
LOCATION:https://epfl.zoom.us/j/82207717593
STATUS:CONFIRMED
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