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@INPROCEEDINGS{Wuttig:905424,
      author       = {Wuttig, Matthias},
      title        = {{N}on-volatile photonic {A}pplications with {P}hase
                      {C}hange {M}aterials},
      reportid     = {FZJ-2022-00665},
      year         = {2021},
      abstract     = {It has been a long-time dream of mankind to design
                      materials with tailored properties. In recent years, the
                      focus of our work has been the design of phase change
                      materials for applications in data storage and advanced
                      photonic applications. In this application, the remarkable
                      property portfolio of phase change materials (PCMs) is
                      employed, which includes the ability to rapidly switch
                      between the amorphous and crystalline state. Surprisingly,
                      in PCMs both states differ significantly in their
                      properties. This material combination makes them very
                      attractive for data storage applications in rewriteable
                      optical data storage and active photonics, where the
                      pronounced difference of optical properties between the
                      amorphous and crystalline state is employed. This
                      unconventional class of materials is also the basis of a
                      storage concept to replace flash memory. Today’s talk will
                      discuss the unique material properties, which characterize
                      phase change materials. In particular, it will be shown that
                      only a well-defined group of materials utilizes a unique
                      bonding mechanism (metavalent bonding), which can explain
                      many of the characteristic features of crystalline phase
                      change materials. Different pieces of evidence for the
                      existence of this novel bonding mechanism, which we have
                      coined metavalent bonding, will be presented. In particular,
                      we will present a novel map, which separates the known
                      strong bonding mechanisms of metallic, ionic and covalent
                      bonding, which provides further evidence that metavalent
                      bonding is a novel and fundamental bonding mechanism. This
                      insight is subsequently employed to design phase change
                      materials for photonic applications. We will demonstrate how
                      the optical contrast can be tuned in different regions of
                      the spectral range, including the realization of plasmonic
                      phase change materials.},
      month         = {Mar},
      date          = {2021-03-06},
      organization  = {Photonics West San Francisco, San
                       Francisco (USA), 6 Mar 2021 - 11 Mar
                       2021},
      subtyp        = {Invited},
      cin          = {PGI-10},
      cid          = {I:(DE-Juel1)PGI-10-20170113},
      pnm          = {5233 - Memristive Materials and Devices (POF4-523)},
      pid          = {G:(DE-HGF)POF4-5233},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/905424},
}