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@ARTICLE{Sharapova:906827,
      author       = {Sharapova, Polina R. and Ferreri, Alessandro},
      title        = {{T}wo-{C}olour {S}pectrally {M}ultimode {I}ntegrated
                      {SU}(1,1) {I}nterferometer},
      journal      = {Symmetry},
      volume       = {14},
      number       = {3},
      issn         = {2073-8994},
      address      = {Basel},
      publisher    = {MDPI},
      reportid     = {FZJ-2022-01721},
      pages        = {552 -},
      year         = {2022},
      abstract     = {Multimode integrated interferometers have great potential
                      for both spectral engineering and metrological applications.
                      However, the material dispersion of integrated platforms
                      constitutes an obstacle that limits the performance and
                      precision of such interferometers. At the same time,
                      two-colour nonlinear interferometers present an important
                      tool for metrological applications, when measurements in a
                      certain frequency range are difficult. In this manuscript,
                      we theoretically developed and investigated an integrated
                      multimode two-colour SU(1,1) interferometer operating in a
                      supersensitive mode. By ensuring the proper design of the
                      integrated platform, we suppressed the dispersion, thereby
                      significantly increasing the visibility of the interference
                      pattern. The use of a continuous wave pump laser provided
                      the symmetry between the spectral shapes of the signal and
                      idler photons concerning half the pump frequency, despite
                      different photon colours. We demonstrate that such an
                      interferometer overcomes the classical phase sensitivity
                      limit for wide parametric gain ranges, when up to 3×104
                      photons are generated.},
      cin          = {PGI-12},
      ddc          = {570},
      cid          = {I:(DE-Juel1)PGI-12-20200716},
      pnm          = {5214 - Quantum State Preparation and Control (POF4-521)},
      pid          = {G:(DE-HGF)POF4-5214},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000774567800001},
      doi          = {10.3390/sym14030552},
      url          = {https://juser.fz-juelich.de/record/906827},
}