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2015 MRS Fall Meeting Logo2015 MRS Fall Meeting & Exhibit

November 29-December 4, 2015 | Boston
Meeting Chairs: T. John Balk, Ram Devanathan, George G. Malliaras, Larry A. Nagahara, Luisa Torsi

Symposium II—Phonon Transport, Interactions and Manipulations in Nanoscale Materials and Devices—Fundamentals and Applications

This symposium aims at addressing fundamental issues related to phonon transport, interactions and manipulation in both nanoscale and bulk materials with an eye towards phonon engineered materials and devices. Demands on engineered phonon properties are ever increasing for a wide range of devices and materials-based solutions. However, gaps between the fundamental understanding and technological demands still remain, particularly in our understanding of phonon interactions.

Due to the rapid progress on materials growth techniques, the list of available materials and the range of possibilities in growth control are expanding. While methods for the precise control of the electronic transport properties as well as for engineering electronic wave functions are presently available, less attention has been paid to the control of the degrees of freedom associated with the crystal lattice - the phonons. However, as the miniaturization of electronic devices progressed during the last decade, thermal management has become a substantial issue in the design of nanoscale electronic devices due to the rapid decrease in phonon transport lengths (and corresponding deterioration of the thermal conductivity) in nanoscale structure. Moreover, phonons play an active role in the functionality of other classes of devices including thermoelectrics, and thermal diodes. In fundamental research over the past few years significant progress has been made in our knowledge of phonon transport across and along arbitrary interfaces, scattering of phonons by crystal defects, delocalized electrons/collective electronic excitations, and solid acoustic vibrations when these occur in structures with small physical dimensions. Phonon interactions generally strongly depend on the length scale, and phonons in nanoscale material show complex behavior. The ensemble behavior of scale-dependent phonon interactions and disentanglement of the complex mechanisms determining the thermal properties of a variety of nanoscale materials are major focuses of the symposium. This includes experiments, and modeling of phonon interactions, transport, and manipulation in bulk and nanoscale materials, and devices.

In addition, novel concepts for phonon devices based on the phonon wave nature are presently emerging. Examples include the quantum control and transport of spins as well as the manipulation of quantum dots and of polariton condensates using phonons. At the same time, a number of novel techniques for the generation, detection, and manipulation of coherent phonons has been developed. Detection, modeling and manipulation of the coherent nature of the fundamental interactions between phonons and electrons, spins, excitons, and other elementary excitations is another thrust in this symposium. Closing these gaps between the fundamental understanding and demands on engineered phonon properties in materials will enable the design of structures that provide novel solutions and enhance our scientific knowledge of applications in areas including nano-photonics, plasmonics, photovoltaics, terahertz photonics, and nanomechanics, etc.

Topics will include:

  • Modeling of phonon dispersion relations and phonon transport
    • Transport in bulk, nanomaterials
    • In plane and cross plane transport in 2D (Graphene and transition metal dichalcogenides, and bulk materials, phase change materials) and nanomaterials
    • Phonon dispersions in bulk, nanomaterials
  • Coherent phonon generations, detection and manipulation
    • Coherent phonon spectroscopy
    • Time-resolved Raman spectroscopy and picosecond ultrasonics
    • Novel approaches for phonon generation
  • Phonon transport and interactions
    • Phonon transport and thermal transport in nanoscale materials
    • Phonons in 2D materials
    • Phonon-phonon interactions, Phonon-interface interactions, Electron-phonon interactions
    • Magneto-acoustic effect
    • Phonon mediated electron-electron interactions
    • Polaritons
  • Phonons in engineered systems
    • Phonon interactions in engineered structures
    • Phononics (Metamaterials, Phonon Bandgap Systems)
    • Novel device concepts (Plasmonics, Nano-Photonics, Thermoelectrics, SASERS)
    • High frequency acousto-electronic devices
    • Thermal diodes, device and circuit
    • Acousto-optical resonators (acoustically modulated photonic structures, acousto-optic structures)

Invited Speakers:

  • Andrey Akimov (The University of Nottingham, United Kingdom)
  • David Cahill (University of Illinois, Urbana, USA)
  • Edgar Cerda (Paul-Drude Institute, Berlin, Germany)
  • Gang Chen (Massachusetts Institute of Technology, USA)
  • Mildred Dresselhaus (Massachusetts Institute of Technology, USA)
  • Joseph Heremans (Ohio State University, USA)
  • Jacob Khurgin (Johns Hopkins University, USA)
  • Vincent Laude (FEMTO-ST, France)
  • Martin Maldovan (Georgia Institute of Technology, USA)
  • Jon Malen (Carnegie Mellon University, USA)
  • Alex Maznev (Massachusetts Institute of Technology, USA)
  • Keith Nelson (Massachusetts Institute of Technology, USA)
  • Simon Phillpot (University of Florida, USA)
  • Ali Shakouri (Purdue University, USA)
  • Clivia Sotomayor Torres (ICREA, Barecelona, Spain)
  • Hiroshi Yamaguchi (NTT-Basic Research Laboratories, Japan)

Symposium Organizers

Masashi Yamaguchi
Rensselaer Polytechnic Institute

Marat Khafizov
Ohio State University

Paulo Santos
Paul-Drude-Institut für Festkörperelektronik

Greg Sun
University Massachusetts, Boston