Special Issue "Advances in Nanophononics"
A special issue of Nanomaterials (ISSN 2079-4991).
Deadline for manuscript submissions: 30 September 2020.
Interests: Control of phonon propagation in nanostructures; phonon–photon interaction
This Special Issue is aimed to present original research papers or comprehensive reviews covering recent progress and new developments in the area of nanophononics. The topics span a wide range of research subjects, either from the experimental or the theoretical points of view, including experimental methods.
Phonons are quantized mechanical vibrations and, as electrons and photons, could be employed as energy and information carriers. The reality is that the technological accomplishments of electronics and photonics have sometimes brought the field of phononics to emulate the former rather than exploiting the distinctive nature of phonons. The current state-of-the-art top-down fabrication sets a lowermost limit to feature size of about 10 nm, influencing the propagation of phonons in a frequency range where phononics can potentially become technologically relevant. Therefore, bringing phonons to the nanoscale has already generated an enormous increase of the activity in the field and, specifically, in the area known as nanophononics. Artificial structuring in the form of plates, layers, phononic crystals, and metamaterials leads to spatial dispersion as a result of symmetry constrictions and morphology of the structure. While the former rule the existing mode symmetries and the occurrence of interactions between phonon states, the latter controls the strength of the interaction. Therefore, the response of the medium depends on the ratio of length scales between the wave and the geometrical structures of the medium. This has stimulated the prospect of the rational design of phononic structures to obtain a desired wave’s behaviour or unconventional wave topologies. In the case that the artificial inhomogeneity is not static but spatial and time-dependent, it may cause time-reversal symmetry breaking, and non-reciprocal wave propagation may occur.
Finally, elastic waves provide an adaptable approach for supporting a coherent coupling between different state variables, which promises a myriad of novel signal-processing functionalities in hybrid systems.
Dr. Francesc Alzina Sureda
Manuscript Submission Information
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- Elastic Metamaterials and Metasurfaces
- Inverse and rational design
- Active/Adaptive phononic structures
- Unconventional elastic waves
- Non-reciprocal elastic wave propagation
- Generation and detection of coherent phonons
- Interaction of phonons with other particles and quasiparticles