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DTSTAMP:20260414T012740
DTSTART:20151123T113000
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URL:https://murmitoyen.com/events/vanille/udem/detail/633874-nonlinear-opti
 cs-in-on-chip-zero-index-metamaterials-n-orad-reshef-harvard
LOCATION:Université de Montréal - Pavillon J.-Armand-Bombardier\, 5155\, 
 chemin de la rampe \, Montréal\, QC\, Canada\, H3T 2B2
SUMMARY:Nonlinear optics in on-chip zero-index metamaterials – Orad Reshe
 f\, Harvard
DESCRIPTION:Orad Reshef\, John A Paulson School of School of Engineering a
 nd Applied Sciences\, Harvard University\, 29 Oxford Street\, Cambridge\, 
 Massachusetts 02138\, USA
\ncoauthors: Alexander W. Raymond\, Yang Li\, P
 hilip Muñoz\, Mei Yin\, Daryl Vulis\, Lysander Christakis\, Shota Kita\, 
 Marko Lončar\, Eric Mazur
\n Optical metamaterials - composite materials 
 whose electromagnetic properties are finely engineered by designing their 
 constituents - have been shown to exhibit strange and exotic properties\, 
 such as negligible or negative indices of refraction and the direct contro
 l of the amplitude and phase of light. These properties have been used for
  innumerable applications\, such as flat lenses\, invisibility cloaks as w
 ell as previously unseen nonlinear interactions.
\nRecently\, our group ha
 s demonstrated the first on-chip metamaterial with a refractive index of z
 ero. These isotropic structures exhibit a refractive index of zero for all
  in-plane propagation directions. The proposed devices are CMOS-compatible
  and can be fabricated using standard lithographic processes on an SOI waf
 er. We will present the theory behind this material as well as the experim
 ental demonstration\, and will conclude by discussing nonlinear propagatio
 n in a zero-index medium. This metamaterial exhibits surprising phase-matc
 hing behaviour\, in particular\, the simultaneous generation of forward- a
 nd backward- propagating light. Using full-wave simulations\, we study the
  propagation and generation of nonlinear signals within these metamaterial
 s and explore their unique phase-matching behaviour in multiple simultaneo
 us directions. We leverage the 2-dimensional nature of these metamaterials
  to explore the dependence of the nonlinear signal on the size as well as 
 shape of the nonlinear material. The presented results have important impl
 ications for future phase-matching schemes and integrated nonlinear applic
 ations.
\nSite web du groupe du Dr Reshef
\nCette conférence est présen
 tée par le RQMP Versant Nord du Département de physique de l'Univers
 ité de Montréal et le Département de génie physique de Polytechnique
  Montréal.
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