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1.
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8 p, 8.1 MB |
Contactless characterization of the elastic properties of glass microspheres
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Maire, Jeremie (Institut Català de Nanociència i Nanotecnologia) ;
Necio, Tomasz (Institut Català de Nanociència i Nanotecnologia) ;
Chávez Ángel, Emigdio (Institut Català de Nanociència i Nanotecnologia) ;
Colombano, Martín F. (Université Paris Cité) ;
Jaramillo Fernández, Juliana (Universitat de Barcelona. Departament d'Electrònica) ;
Sotomayor Torres, Clivia M. (Institut Català de Nanociència i Nanotecnologia) ;
Capuj, Nestor Eduardo (Universidad de La Laguna. Departamento de Física) ;
Navarro Urrios, Daniel (Universitat de Barcelona. Departament d'Electrònica)
Glass microspheres are of great interest for numerous industrial, biomedical, or standalone applications, but it remains challenging to evaluate their elastic and optical properties in a non-destructive way. [...]
2023 -  10.1063/5.0146969
APL materials, Vol. 11 (April 2023) , art. 41128
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2.
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24 p, 2.7 MB |
Excitation and detection of acoustic phonons in nanoscale systems
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Ng, Ryan C. (Institut Català de Nanociència i Nanotecnologia) ;
Sachat, Alexandros el (National Center for Scientific Research Demokritos) ;
Céspedes Mulero, Francisco (Universitat Autònoma de Barcelona. Departament de Física) ;
Poblet, Martin (Institut Català de Nanociència i Nanotecnologia) ;
Madiot, Guilhem (Institut Català de Nanociència i Nanotecnologia) ;
Jaramillo Fernández, Juliana (Institut Català de Nanociència i Nanotecnologia) ;
Florez, Omar (Universitat Autònoma de Barcelona. Departament de Física) ;
Xiao, Peng (Institut Català de Nanociència i Nanotecnologia) ;
Sledzinska, Marianna (Institut Català de Nanociència i Nanotecnologia) ;
Sotomayor Torres, Clivia M (Institut Català de Nanociència i Nanotecnologia) ;
Chávez Ángel, Emigdio (Institut Català de Nanociència i Nanotecnologia)
Phonons play a key role in the physical properties of materials, and have long been a topic of study in physics. While the effects of phonons had historically been considered to be a hindrance, modern research has shown that phonons can be exploited due to their ability to couple to other excitations and consequently affect the thermal, dielectric, and electronic properties of solid state systems, greatly motivating the engineering of phononic structures. [...]
2022 - 10.1039/d2nr04100f
Nanoscale, Vol. 14, issue 37 (Oct. 2022) , p. 13428-13451
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3.
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7 p, 1.3 MB |
Terahertz displacive excitation of a coherent Raman-active phonon in V2O3
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Giorgianni, Flavio (Paul Scherrer Institut (Suïssa)) ;
Udina, Mattia (Università degli studi di Roma "La Sapienza". Department of Physics) ;
Cea, Tommaso (IMDEA Nanoscience) ;
Paris, Eugenio (Paul Scherrer Institut (Suïssa)) ;
Caputo, Marco (Photon Science Division. Paul Scherrer Institute) ;
Radovic, Milan (Photon Science Division. Paul Scherrer Institute) ;
Boie, Larissa (ETH Zurich. Physics Department) ;
Sakai, Joe (Institut Català de Nanociència i Nanotecnologia) ;
Schneider, Christof W. (Paul Scherrer Institut (Suïssa)) ;
Johnson, Steven Lee (ETH Zurich. Physics Department)
Nonlinear processes involving frequency-mixing of light fields set the basis for ultrafast coherent spectroscopy of collective modes in solids. In certain semimetals and semiconductors, generation of coherent phonon modes can occur by a displacive force on the lattice at the difference-frequency mixing of a laser pulse excitation on the electronic system. [...]
2022 - 10.1038/s42005-022-00882-7
Communications Physics, Vol. 5 (2022) , art. 103
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4.
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12 p, 3.1 MB |
Electrically tunable nonequilibrium optical response of graphene
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Pogna, Eva A. A. (Politecnico di Milano. Dipartimento di Fisica) ;
Tomadin, Andrea (Università di Pisa. Dipartimento di Fisica) ;
Balci, Osman (University of Cambridge. Cambridge Graphene Centre) ;
Soavi, Giancarlo (University of Cambridge. Cambridge Graphene Centre) ;
Paradisanos, Ioannis (University of Cambridge. Cambridge Graphene Centre) ;
Guizzardi, Michele (Politecnico di Milano. Dipartimento di Fisica) ;
Pedrinazzi, Paolo (Politecnico di Milano. Dipartimento di Fisica) ;
Mignuzzi, Sandro (University of Cambridge. Cambridge Graphene Centre) ;
Tielrooij, Klaas-Jan (Institut Català de Nanociència i Nanotecnologia) ;
Polini, Marco (Università di Pisa. Dipartimento di Fisica) ;
Ferrari, Andrea C. (University of Cambridge. Cambridge Graphene Centre) ;
Cerullo, Giulio (Politecnico di Milano. Dipartimento di Fisica)
The ability to tune the optical response of a material via electrostatic gating is crucial for optoelectronic applications, such as electro-optic modulators, saturable absorbers, optical limiters, photodetectors, and transparent electrodes. [...]
2022 - 10.1021/acsnano.1c04937
ACS nano, Vol. 16, issue 3 (March 2022) , p. 3613-3624
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5.
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11 p, 4.3 MB |
Hot-carrier cooling in high-quality graphene is intrinsically limited by optical phonons
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Pogna, Eva A. A. (Politecnico di Milano. Dipartimento di Fisica) ;
Jia, Xiaoyu (Max-Planck-Institut für Polymerforschung) ;
Principi, Alessandro (University of Manchester. School of Physics and Astronomy) ;
Block, Alexander (Institut Català de Nanociència i Nanotecnologia) ;
Banszerus, Luca (RWTH Aachen University) ;
Zhang, Jincan (Beijing Graphene Institute) ;
Liu, Xiaoting (Beijing Graphene Institute) ;
Sohier, Thibault (Université de Liège. CESAM) ;
Forti, Stiven (Center for Nanotechnology Innovation (Pisa, Itàlia)) ;
Soundarapandian, Karuppasamy (Institut de Ciències Fotòniques) ;
Terrés, Bernat (Institut de Ciències Fotòniques) ;
Mehew, Jake D. (Institut Català de Nanociència i Nanotecnologia) ;
Trovatello, Chiara (Politecnico di Milano. Dipartimento di Fisica) ;
Coletti, Camilla (Center for Nanotechnology Innovation (Pisa, Itàlia)) ;
Koppens, Frank (Institució Catalana de Recerca i Estudis Avançats) ;
Bonn, Mischa (Max-Planck-Institut für Polymerforschung) ;
Wang, Hai I. (Max-Planck-Institut für Polymerforschung) ;
van Hulst, Niek F.. (Institució Catalana de Recerca i Estudis Avançats) ;
Verstraete, Matthieu J. (Université de Liège. CESAM) ;
Peng, Hailin (Beijing Graphene Institute) ;
Liu, Zhongfan (Beijing Graphene Institute) ;
Stampfer, Christoph (RWTH Aachen University) ;
Cerullo, Giulio (Politecnico di Milano. Dipartimento di Fisica) ;
Tielrooij, Klaas-Jan (Institut Català de Nanociència i Nanotecnologia)
Many promising optoelectronic devices, such as broadband photodetectors, nonlinear frequency converters, and building blocks for data communication systems, exploit photoexcited charge carriers in graphene. [...]
2021 - 10.1021/acsnano.0c10864
ACS nano, Vol. 15, issue 7 (July 2021) , p. 11285-11295
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6.
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21 p, 1.9 MB |
Thermal transport in nanoporous holey silicon membranes investigated with optically induced transient thermal gratings
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Duncan, Ryan A. (Massachusetts Institute of Technology. Department of Chemistry) ;
Romano, Giuseppe (Massachusetts Institute of Technology. Department of Mechanical Engineering) ;
Sledzinska, Marianna (Institut Català de Nanociència i Nanotecnologia) ;
Maznev, Alexei A. (Massachusetts Institute of Technology. Department of Chemistry) ;
Péraud, Jean-Philippe M. (Lawrence Berkeley National Laboratory. Computational Research Division) ;
Hellman, Olle (California Institute of Technology. Department of Applied Physics and Materials Science) ;
Sotomayor Torres, Clivia M. (Institut Català de Nanociència i Nanotecnologia) ;
Nelson, Keith A. (Massachusetts Institute of Technology. Department of Chemistry)
In this study, we use transient thermal gratings-a non-contact, laser-based thermal metrology technique with intrinsically high accuracy-to investigate room-temperature phonon-mediated thermal transport in two nanoporous holey silicon membranes with limiting dimensions of 120 nm and 250 nm, respectively. [...]
2020 - 10.1063/1.5141804
Journal of applied physics, Vol. 128, issue 23 (Dec. 2020) , art. 235106
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7.
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7 p, 6.2 MB |
Ballistic Phonons in Ultrathin Nanowires
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Vakulov, Daniel (Eindhoven University of Technology) ;
Gireesan, Subash (Center for Computational Energy Research) ;
Swinkels, Milo Y. (University of Basel) ;
Chavez, Ruben (Eindhoven University of Technology) ;
Vogelaar, Tom (Eindhoven University of Technology) ;
Torres, Pol (Universitat Autònoma de Barcelona. Departament de Física) ;
Campo, Alessio (University of Basel) ;
De Luca, Marta (University of Basel) ;
Verheijen, Marcel A. (Eindhoven University of Technology) ;
Koelling, Sebastian (Eindhoven University of Technology) ;
Gagliano, Luca (Eindhoven University of Technology) ;
Haverkort, Jos E. M. (Eindhoven University of Technology) ;
Àlvarez Calafell, Francesc Xavier (Universitat Autònoma de Barcelona) ;
Bobbert, Peter A. (Center for Computational Energy Research) ;
Zardo, Ilaria (University of Basel) ;
Bakkers, Erik P. A. M. (Eindhoven University of Technology)
According to Fourier's law, a temperature difference across a material results in a linear temperature profile and a thermal conductance that decreases inversely proportional to the system length. These are the hallmarks of diffusive heat flow. [...]
2020 - 10.1021/acs.nanolett.0c00320
Nano letters, Vol. 20, Num. 4 (April 2020) , p. 2703-2709
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8.
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30 p, 1.1 MB |
Raman antenna effect from exciton-phonon coupling in organic semiconducting nanobelts
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Wang, Mao (Norwegian University of Science and Technology) ;
Gong, Yi (Norwegian University of Science and Technology) ;
Alzina, Francesc (Institut Català de Nanociència i Nanotecnologia) ;
Svoboda, Ondrej (Brno University of Technology) ;
Ballesteros, Belén (Institut Català de Nanociència i Nanotecnologia) ;
Sotomayor Torres, Clivia M. (Institut Català de Nanociència i Nanotecnologia) ;
Xiao, Senbo (Norwegian University of Science and Technology) ;
Zhang, Zhiliang (Norwegian University of Science and Technology) ;
He, Jianying (Norwegian University of Science and Technology)
The highly anisotropic interactions in organic semiconductors together with the soft character of organic materials lead to strong coupling between nuclear vibrations and exciton dynamics, which potentially results in anomalous electrical, optical and optoelectrical properties. [...]
2017 - 10.1039/c7nr07212k
Nanoscale, Vol. 9, Issue 48 (December 2017) , p. 19328-19336
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9.
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10 p, 2.0 MB |
Impact of the regularization parameter in the mean free path reconstruction method : Nanoscale heat transport and beyond
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Sanchez Martinez, Miguel Ángel (Institut Català de Nanociència i Nanotecnologia) ;
Alzina, Francesc (Institut Català de Nanociència i Nanotecnologia) ;
Oyarzo, Juan (Pontificia Universidad Católica de Valparaíso. Instituto de Química) ;
Sotomayor Torres, Clivia M. (Institut Català de Nanociència i Nanotecnologia) ;
Chávez Ángel, Emigdio (Institut Català de Nanociència i Nanotecnologia)
The understanding of the mean free path (MFP) distribution of the energy carriers in materials (e. g. , electrons, phonons, magnons, etc. ) provides a key physical insight into their transport properties. [...]
2019 - 10.3390/nano9030414
Nanomaterials, Vol. 9, Issue 3 (March 2019) , art. 414
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10.
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13 p, 1.2 MB |
Acoustic phonon propagation in ultra-thin Si membranes under biaxial stress field
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Graczykowski, Bartlomiej (Institut Català de Nanociència i Nanotecnologia) ;
Gomis-Bresco, Jordi (Institut Català de Nanociència i Nanotecnologia) ;
Alzina, Francesc (Institut Català de Nanociència i Nanotecnologia) ;
Reparaz, Juan Sebastian (Institut Català de Nanociència i Nanotecnologia) ;
Shchepetov, Andrey (VTT Technical Research Centre of Finland) ;
Prunnila, Mika (VTT Technical Research Centre of Finland) ;
Ahopelto, Jouni (VTT Technical Research Centre of Finland) ;
Sotomayor Torres, Clivia M. (Institut Català de Nanociència i Nanotecnologia)
We report on stress induced changes in the dispersion relations of acoustic phonons propagating in 27 nm thick single crystalline Si membranes. The static tensile stress (up to 0. 3 GPa) acting on the Si membranes was achieved using an additional strain compensating silicon nitride frame. [...]
2014 - 10.1088/1367-2630/16/7/073024
New journal of physics, Vol. 16 (July 2014) , art. 73024
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