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UID:6a70d0ce8cdd3
DTSTART:20260813T083000Z
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20260813T093000Z
LOCATION:Seminar Room
SUMMARY:ICFO | SALVADOR POVEDA HOSPITAL
CLASS:PUBLIC
DESCRIPTION:The design of photonic devices increasingly relies on accurate 
 numerical simulations to simulate light propagation and optimize device pe
 rformance. Among the available techniques\, the Eigenmode Expansion (EME) 
 method has become a powerful tool for modeling complex optical structures 
 due to its computational efficiency and its ability to describe mode coupl
 ing in arbitrary waveguide geometries. However\, most existing EME impleme
 ntations are restricted to linear optical phenomena\, limiting their appli
 cation to many emerging technologies based on nonlinear optics.\nIn this t
 alk\, I will present an extension of the Eigenmode Expansion framework tha
 t incorporates nonlinear frequency-mixing processes. The proposed approach
  describes second-order processes\, including difference-frequency generat
 ion (DFG)\, sum-frequency generation (SFG)\, and spontaneous parametric do
 wn-conversion (SPDC)\, as well as third-order processes such as four-wave 
 mixing (FWM) and spontaneous four-wave mixing (SFWM). The formulation natu
 rally supports multimode propagation\, bidirectional fields\, and arbitrar
 y photonic structures by combining nonlinear propagation matrices with con
 ventional linear scattering matrices.
DTSTAMP:20260803T173302Z
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