% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Zhang:150542,
      author       = {Zhang, Jie and Mikulics, Martin and Adam, Roman and
                      Grützmacher, Detlev and Sobolewski, Roman},
      title        = {{G}eneration of {TH}z transients by photoexcited
                      single-crystal {G}a{A}s meso-structures},
      journal      = {Applied physics / B},
      volume       = {113},
      number       = {3},
      issn         = {1432-0649},
      address      = {Berlin},
      publisher    = {Springer},
      reportid     = {FZJ-2014-00596},
      pages        = {339 - 344},
      year         = {2013},
      abstract     = {We report a sub-picosecond photoresponse and THz transient
                      generation of GaAs single-crystal mesoscopic platelets
                      excited by femtosecond optical pulses. Our structures were
                      fabricated by a top-down technique, by patterning an
                      epitaxial, 500-nm-thick GaAs film grown on top of an AlAs
                      sacrificial layer and then transferring the resulting etched
                      away 10 9 20-lm2 platelets onto an MgO substrate using a
                      micropipette. The freestanding GaAs devices, incorporated
                      into an Au coplanar strip line, exhibited extremely low dark
                      currents and *0.4 $\%$ detection efficiency at 10 V bias.
                      The all-optical, pump–probe carrier dynamics analysis
                      showed that, for 800-nmwavelengthexcitation, the intrinsic
                      relaxation of photocarriersfeatured a 310-fs-wide transient
                      with a 290 fs falltime. We have also carried out a
                      femtosecond, timeresolved electro-optic characterization of
                      our devices and recorded along the transmission line the
                      electrical transients as short as *600 fs, when the platelet
                      was excited by a train of 100-fs-wide, 800-nm-wavelength
                      optical laser pulses. The platelets have been also
                      demonstrated to be very efficient generators of free-space
                      propagating THz transients with the spectral bandwidth
                      exceeding 2 THz. The presented performance of the epitaxial,
                      freestanding GaAs meso-structured photodevices makes them
                      uniquely suitable for THz-frequency optoelectronic
                      applications, ranging from ultrafast photodetectors to
                      THz-bandwidth optical-to-electrical transducers and
                      photomixers.},
      cin          = {PGI-9 / PGI-6 / JARA-FIT},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-9-20110106 / I:(DE-Juel1)PGI-6-20110106 /
                      $I:(DE-82)080009_20140620$},
      pnm          = {423 - Sensorics and bioinspired systems (POF2-423)},
      pid          = {G:(DE-HGF)POF2-423},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000328054500005},
      doi          = {10.1007/s00340-013-5495-1},
      url          = {https://juser.fz-juelich.de/record/150542},
}