Zobrazeno 1 - 10
of 182
pro vyhledávání: '"ALZINA, F."'
Autor:
Sledzinska, M., Jumbert, G., Placidi, M., Arrighi, A., Xiao, P., Alzina, F., Torres, C. M. Sotomayor
The possibility of tailoring the critical strain of 2D materials will be crucial for the fabrication of flexible devices. In this paper, the fracture in polycrystalline MoS2 films with two different grain orientations is studied at the micro- and nan
Externí odkaz:
http://arxiv.org/abs/1911.10769
The understanding of the mean free path (MFP) distribution of the energy carriers in materials (e.g. electrons, phonons, magnons, etc.) is a key physical insight into their transport properties. In this context, MFP spectroscopy has become an importa
Externí odkaz:
http://arxiv.org/abs/1808.00708
Autor:
Sledzinska, M., Quey, R., Mortazavi, B., Graczykowski, B., Placidi, M., Reig, D. Saleta, Navarro-Urrios, D., Alzina, F., Colombo, L., Roche, S., Torres, C. M. Sotomayor
We report a record low thermal conductivity in polycrystalline MoS2 obtained by varying grain sizes and orientations in ultrathin films. By optimizing the sulphurisation parameters of nanometre-thick Mo layer, we could grow MoS2 films with tuneable m
Externí odkaz:
http://arxiv.org/abs/1706.06484
Autor:
Navarro-Urrios, D., Capuj, N. E., Colombano, M. F., Garcia, P. D., Sledzinska, M., Alzina, F., Griol, A., Martinez, A., Sotomayor-Torres, C. M.
Publikováno v:
Nature Communications 8, 14965 (2017)
Optical non-linearities, such as thermo-optic effects and free-carrier-dispersion, are often considered as undesired effects in silicon-based resonators and, more specifically, optomechanical (OM) cavities, affecting the relative detuning between an
Externí odkaz:
http://arxiv.org/abs/1609.04390
Autor:
Navarro-Urrios, D., Gomis-Bresco, J., Capuj, N. E., Alzina, F., Griol, A., Puerto, D., Martínez, A., Sotomayor-Torres, C. M.
Publikováno v:
Journal of Applied Physics 116, 093506 (2014)
We report on the modification of the optical and mechanical properties of a silicon 1D optomechanical crystal cavity due to thermo-optic effects in a high phonon/photon population regime. The cavity heats up due to light absorption in a way that shif
Externí odkaz:
http://arxiv.org/abs/1605.07776
Autor:
Sledzinska, M., Graczykowski, B., Placidi, M., Reig, D. Saleta, Sachat, A. El, Reparaz, J. S., Alzina, F., Roche, S., Mortazavi, B., Quey, R., Torres, C. M. Sotomayor
We report a technique for transferring large areas of the CVD-grown, few-layer MoS2 from the original substrate to another arbitrary substrate and onto holey substrates, in order to obtain free-standing structures. The method consists of a polymer- a
Externí odkaz:
http://arxiv.org/abs/1604.04865
Autor:
Gomis-Bresco, J., Navarro-Urrios, D., Oudich, M., El-Jallal, S., Griol, A., Puerto, D., Chavez, E., Pennec, Y., Djafari-Rouhani, B., Alzina, F., Martínez, A., Torres, C. M. Sotomayor
Publikováno v:
Nature Communications, 5, 4452 (2014)
Recent years have witnessed the boom of cavity optomechanics, which exploits the confinement and coupling of optical and mechanical waves at the nanoscale. Amongst their physical implementations, optomechanical (OM) crystals built on semiconductor sl
Externí odkaz:
http://arxiv.org/abs/1401.1691
Autor:
Reparaz, J. S., Chavez-Angel, E., Wagner, M. R., Graczykowski, B., Gomis-Bresco, J., Alzina, F., Torres, C. M. Sotomayor
We present a novel high resolution contactless technique for thermal conductivity determination and thermal field mapping based on creating a thermal distribution of phonons using a heating laser, while a second laser probes the local temperature thr
Externí odkaz:
http://arxiv.org/abs/1312.7705
The specific heat of ultra-thin free-standing membranes is calculated using the elastic continuum model. We first obtain the dispersion relations of the discrete set of acoustic modes in the system. The specific heat is then calculated by summing ove
Externí odkaz:
http://arxiv.org/abs/1211.2530
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