Subharmonic Resonant Optical Excitation of Confined Acoustic Modes in a Free-Standing Semiconductor Membrane at GHz Frequencies with a High-Repetition-Rate Femtosecond Laser

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Bruchhausen_PhysRevLett.106.077401.pdf
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2011
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Physical Review Letters. 2011, 106(7). ISSN 0031-9007. Available under: doi: 10.1103/PhysRevLett.106.077401
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We propose subharmonic resonant optical excitation with femtosecond lasers as a new method for the characterization of phononic and nanomechanical systems in the gigahertz to terahertz frequency range. This method is applied for the investigation of confined acoustic modes in a free-standing semiconductor membrane. By tuning the repetition rate of a femtosecond laser through a subharmonic of a mechanical resonance we amplify the mechanical amplitude, directly measure the linewidth with megahertz resolution, infer the lifetime of the coherently excited vibrational states, accurately determine the system’s quality factor, and determine the amplitude of the mechanical motion with femtometer resolution.

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ISO 690BRUCHHAUSEN, Axel, Raphael GEBS, Florian HUDERT, Daniel ISSENMANN, Gregor KLATT, Albrecht BARTELS, Olivier SCHECKER, Reimar WAITZ, Artur ERBE, Elke SCHEER, Jean-Roch HUNTZINGER, Adnen MLAYAH, Thomas DEKORSY, 2011. Subharmonic Resonant Optical Excitation of Confined Acoustic Modes in a Free-Standing Semiconductor Membrane at GHz Frequencies with a High-Repetition-Rate Femtosecond Laser. In: Physical Review Letters. 2011, 106(7). ISSN 0031-9007. Available under: doi: 10.1103/PhysRevLett.106.077401
BibTex
@article{Bruchhausen2011Subha-14073,
  year={2011},
  doi={10.1103/PhysRevLett.106.077401},
  title={Subharmonic Resonant Optical Excitation of Confined Acoustic Modes in a Free-Standing Semiconductor Membrane at GHz Frequencies with a High-Repetition-Rate Femtosecond Laser},
  number={7},
  volume={106},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Bruchhausen, Axel and Gebs, Raphael and Hudert, Florian and Issenmann, Daniel and Klatt, Gregor and Bartels, Albrecht and Schecker, Olivier and Waitz, Reimar and Erbe, Artur and Scheer, Elke and Huntzinger, Jean-Roch and Mlayah, Adnen and Dekorsy, Thomas}
}
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