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Acoustic Localization Phenomena in Ferroelectric Nanophononic Devices

Autor: Bruchhausen, A., Lanzillotti-Kimura, N. D., Jusserand, B., Soukiassian, A., Schlom, D. G., Dekorsy, T., Fainstein, A.

Publikováno v: Phys. Rev. Materials 2, 106002 (2018)

The engineering of phononic resonances in ferroelectric structures appears as a new knob in the design and realization of novel multifunctional devices. In this work we experimentally study phononic resonators based on insulating (BaTiO3, SrTiO3) and

Externí odkaz: http://arxiv.org/abs/1605.00147

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Polarization dependence of coherent phonon generation and detection in the 3D topological insulator Bi2Te3

Autor: Misochko, O. V., Flock, J., Dekorsy, T.

We have studied the polarization dependence of coherent phonons in the topological insulator Bi2Te3. Using polarization-dependent femtosecond pump-probe spectroscopy, we measured coherent phonons as a function of angle when the pump and probe polariz

Externí odkaz: http://arxiv.org/abs/1504.07746

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Lifetimes of Confined Acoustic Phonons in Ultra-Thin Silicon Membranes

Autor: Cuffe, J., Ristow, O., Chávez, E., Shchepetov, A., Chapuis, P-O., Alzina, F., Hettich, M., Prunnila, M., Ahopelto, J., Dekorsy, T., Torres, C. M. Sotomayor

We study the relaxation of coherent acoustic phonon modes with frequencies up to 500 GHz in ultra-thin free-standing silicon membranes. Using an ultrafast pump-probe technique of asynchronous optical sampling, we observe that the decay time of the fi

Externí odkaz: http://arxiv.org/abs/1209.2174

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Sub-harmonic resonant excitation of confined acoustic modes at GHz frequencies with a high-repetition-rate femtosecond laser

Autor: 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.

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

Externí odkaz: http://arxiv.org/abs/1012.1345

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Experimental study of the coherent A1 phonons in Te with tailored femtosecond pulses

Autor: Misochko, O V, Lebedev, M V, Schaefer, H, Dekorsy, T

Publikováno v: JOURNAL OF PHYSICS-CONDENSED MATTER Volume: 19 Issue: 15 Article Number: 156227 Published: APR 18 2007

We tailor the shape and phase of the pump pulse spectrum in order to study the coherent lattice dynamics in tellurium. Employing the coherent control via splitting the pump pulse into a two-pulse sequence, we show that the oscillations due to A1 cohe

Externí odkaz: http://arxiv.org/abs/0704.3319

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