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SUMMARY:IEM Seminar Series: Teaching a material new tricks:  reconfigurabl
 e 2nd order nonlinearities on chip
DTSTART:20260513T140000
DTEND:20260513T150000
DTSTAMP:20260525T205728Z
UID:62744611ef31bb652071b9385cea7c00978c5eac8c7c1ae0b4cfcb48
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Camille-Sophie Brès\, Photonics System Laboratory (PHO
 SL)\, IEM\nAbstract\nThe drive toward fully integrated photonic systems de
 mands the seamless integration of diverse functionalities within a unified
  material platform where possible. Silicon nitride has emerged as a corner
 stone platform due to its low loss\, CMOS compatibility\, excellent χ⁽
 ³⁾ nonlinearity\, and maturity in large-scale process flows. Yet its la
 ck of an intrinsic second-order nonlinearity χ⁽²⁾ has limited its us
 e in applications requiring efficient frequency conversion. In this talk\,
  I will present how all-optical poling enables self-written χ⁽²⁾ non
 linear gratings in silicon nitride\, effectively teaching this material ne
 w tricks while preserving its fabrication advantages and unlocking a flexi
 ble and broadband second-order nonlinearity directly within standard SiN w
 aveguides.\n\nWhen combined with high-Q microresonators that enable nonlin
 ear optical phenomena at milliwatt power levels\, remarkable opportunities
  emerge. These include ultrabroadband frequency doublers for wavelength co
 nversion\, high-coherence short-wavelength sources for applications in qua
 ntum technologies and spectroscopy\, and flexible visible light sources wi
 th tunable characteristics through cascaded processes.  We will also show
  how it unlocks monolithic linear electro-optic modulation. This approach 
 opens new directions for silicon nitride integrated photonics\, enabling u
 nprecedented functionality while maintaining compatibility with existing f
 abrication infrastructure.\n\nBio\nProf. Camille-Sophie Brès is an Associ
 ate Professor in the Institute of Electrical Engineering within the School
  of Engineering of EPFL and head of the Photonics System Laboratory (PHOSL
 ) and the director of the doctoral program in Photonics (EDPO). She receiv
 ed a bachelor degree in Electrical Engineering from McGill University (Mon
 treal\, Canada) in 2002\, and the PhD in Electrical and Computer Engineeri
 ng from Princeton University in 2007. She joined EPFL after a postdoc at t
 he University of California San Diego (UCSD). Her research interests lie o
 n inducing\, leveraging and enhancing nonlinear processes in waveguides fo
 r the optimization of light manipulation\, exploiting the unique propertie
 s of various material platforms (SiN\, AlN\, TFLN\, SiC ...) combined wit
 h advanced device engineering. Prof. Brès received  the Early Career Wom
 an in Engineering Award in 2016. She is the recipient of ERC StG\, CoG\, A
 dG and PoC.  She is a senior member of the IEEE and SPIE\, and a fellow o
 f OPTICA.\n 
LOCATION:BM 5202 https://plan.epfl.ch/?room==BM%205202 https://epfl.zoom.u
 s/j/63586769148
STATUS:CONFIRMED
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