تقرير
Sub-harmonic resonant excitation of confined acoustic modes at GHz frequencies with a high-repetition-rate femtosecond laser
| العنوان: | Sub-harmonic resonant excitation of confined acoustic modes at GHz frequencies with a high-repetition-rate femtosecond laser |
|---|---|
| المؤلفون: | Bruchhausen, A., Gebs, R., Hudert, F., Issenmann, D., Klatt, G., Bartels, A., Schecker, O., Waitz, R., Erbe, A., Scheer, E., Huntzinger, J. -R., Mlayah, A., Dekorsy, T. |
| سنة النشر: | 2010 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Physics - Optics |
| الوصف: | We propose sub-harmonic 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 sub-harmonic 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. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.106.077401 |
| URL الوصول: | http://arxiv.org/abs/1012.1345 |
| رقم الأكسشن: | edsarx.1012.1345 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.106.077401 |
|---|