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@ARTICLE{Julsgaard:885755,
      author       = {Julsgaard, Brian and von den Driesch, Nils and
                      Tidemand-Lichtenberg, Peter and Pedersen, Christian and
                      Ikonic, Zoran and Buca, Dan},
      title        = {{C}arrier lifetime of {G}e{S}n measured by spectrally
                      resolved picosecond photoluminescence spectroscopy},
      journal      = {Photonics research},
      volume       = {8},
      number       = {6},
      issn         = {2327-9125},
      address      = {Washington, DC},
      publisher    = {OSA},
      reportid     = {FZJ-2020-04067},
      pages        = {788},
      year         = {2020},
      abstract     = {We present an experimental setup capable of time-resolved
                      photoluminescence spectroscopy for photon energies in the
                      range of 0.51 to 0.56 eV with an instrument time response of
                      75 ps. The detection system is based on optical parametric
                      three-wave mixing, operates at room temperature, has
                      spectral resolving power, and is shown to be well suited for
                      investigating dynamical processes in germanium-tin alloys.
                      In particular, the carrier lifetime of a direct-bandgap
                      Ge1−𝑥Sn𝑥 film with concentration $𝑥=12.5\%$ and
                      biaxial strain $−0.55\%$ is determined to be
                      217±15  ps at a temperature of 20 K. A room-temperature
                      investigation indicates that the variation in this lifetime
                      with temperature is very modest. The characteristics of the
                      photoluminescence as a function of pump fluence are
                      discussed.},
      cin          = {PGI-9 / PGI-10 / JARA-FIT},
      ddc          = {620},
      cid          = {I:(DE-Juel1)PGI-9-20110106 / I:(DE-Juel1)PGI-10-20170113 /
                      I:(DE-Juel1)VDB881},
      pnm          = {521 - Controlling Electron Charge-Based Phenomena
                      (POF3-521)},
      pid          = {G:(DE-HGF)POF3-521},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000537961100005},
      doi          = {10.1364/PRJ.385096},
      url          = {https://juser.fz-juelich.de/record/885755},
}