Journal ArticleDOI
Surface phononic graphene.
Si-Yuan Yu,Xiaochen Sun,Xu Ni,Qing Wang,Xue-Jun Yan,Cheng He,Xiaoping Liu,Liang Feng,Ming-Hui Lu,Yan-Feng Chen +9 more
TLDR
The demonstrated fully integrated artificial phononic graphene platform here constitutes a step towards on-chip quantum simulators of graphene and unique monolithic electro-acoustic integrated circuits.Abstract:
Strategic manipulation of wave and particle transport in various media is the key driving force for modern information processing and communication. In a strongly scattering medium, waves and particles exhibit versatile transport characteristics such as localization, tunnelling with exponential decay, ballistic, and diffusion behaviours due to dynamical multiple scattering from strong scatters or impurities. Recent investigations of graphene have offered a unique approach, from a quantum point of view, to design the dispersion of electrons on demand, enabling relativistic massless Dirac quasiparticles, and thus inducing low-loss transport either ballistically or diffusively. Here, we report an experimental demonstration of an artificial phononic graphene tailored for surface phonons on a LiNbO3 integrated platform. The system exhibits Dirac quasiparticle-like transport, that is, pseudo-diffusion at the Dirac point, which gives rise to a thickness-independent temporal beating for transmitted pulses, an analogue of Zitterbewegung effects. The demonstrated fully integrated artificial phononic graphene platform here constitutes a step towards on-chip quantum simulators of graphene and unique monolithic electro-acoustic integrated circuits.read more
Citations
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Journal ArticleDOI
Topological phases in acoustic and mechanical systems
TL;DR: In this paper, the essential physical concepts that underpin various classes of topological phenomena realized in acoustic and mechanical systems are introduced, including Dirac points, the quantum Hall, quantum spin Hall and valley Hall effects, Floquet topological phases, 3D gapless states and Weyl crystals.
Journal ArticleDOI
Artificial gauge fields in materials and engineered systems
Monika Aidelsburger,Monika Aidelsburger,Monika Aidelsburger,Sylvain Nascimbene,Nathan Goldman +4 more
TL;DR: In this paper, the authors present a review of various forms of artificial electromagnetic fields and spin-orbit couplings for matter and light and connect different communities, by revealing explicit links between the diverse forms and realizations of artificial gauge fields.
Journal ArticleDOI
Breaking the barriers: advances in acoustic functional materials
TL;DR: In this article, the authors present a review of recent developments in the field of acoustic metamaterials, including zero/negative refraction, subwavelength imaging, sound cloaking, total sound absorption, metasurface and phase engineering, Dirac physics and topology-inspired acoustic engineering, non-Hermitian parity-time synthetic active active metammaterials, and one-way propagation of sound waves.
Journal ArticleDOI
Electrical tuning of elastic wave propagation in nanomechanical lattices at MHz frequencies.
Jinwoong Cha,Chiara Daraio +1 more
TL;DR: One-dimensional, non-linear, nanoelectromechanical lattices (NEML) with active control of the frequency band dispersion in the radio-frequency domain (10–30 MHz), inspired by NEMS-based phonon waveguides, and includes the voltage-induced frequency tuning of the individual resonators.
Journal ArticleDOI
Physics of surface vibrational resonances: pillared phononic crystals, metamaterials, and metasurfaces.
Yabin Jin,Yan Pennec,Bernard Bonello,Hossein Honarvar,Leonard Dobrzynski,Bahram Djafari-Rouhani,Mahmoud I. Hussein +6 more
TL;DR: The history and development of pillared materials are overviewed, a detailed synopsis of a selection of key research topics that involve the utilization of pillars or similar branching substructures in different contexts are provided, and some perspectives on the state of the field are provided.
References
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Journal ArticleDOI
Locally resonant surface acoustic wave band gaps in a two-dimensional phononic crystal of pillars on a surface
TL;DR: In this paper, the propagation of acoustic waves in a two-dimensional array of cylindrical pillars on the surface of a semi-infinite substrate was investigated, and it was shown that the phononic crystal can support a number of surface propagating modes in the nonradiative region of the substrate, or sound cone, as limited by the slowest bulk acoustic wave.
Journal ArticleDOI
Extremal transmission at the Dirac point of a photonic band structure
TL;DR: In this article, the effect of a Dirac point on the transmission of monochromatic radiation through a photonic crystal was studied and it was shown that the extremal transmission is inversely proportional to the longitudinal dimension of the crystal.
Journal ArticleDOI
Observation of novel edge states in photonic graphene
Mikael C. Rechtsman,Yonatan Plotnik,Daohong Song,Matthias Heinrich,Julia M. Zeuner,Stefan Nolte,Natalia Malkova,Jingjun Xu,Alexander Szameit,Zhigang Chen,Mordechai Segev +10 more
TL;DR: In this article, the edge states on both the zig-zag and bearded edges of a photonic honeycomb lattice of carbon atoms were directly image and measured their dispersion properties, and most importantly, one residing on the bearded edge which was unknown and cannot be explained through conventional tight-binding theory.
Journal ArticleDOI
Two-Dimensional Mott-Hubbard Electrons in an Artificial Honeycomb Lattice
Achintya Singha,Marco Gibertini,Biswajit Karmakar,Shengjun Yuan,Marco Polini,Giovanni Vignale,Giovanni Vignale,Mikhail I. Katsnelson,Aron Pinczuk,Loren Pfeiffer,Ken W. West,Vittorio Pellegrini +11 more
TL;DR: The excitation spectrum in a magnetic field is probed, identifying collective modes that emerged from the Coulomb interaction in the artificial lattice, as predicted by the Mott-Hubbard model and suggesting the existence of a Coulomb-driven ground state.
Journal ArticleDOI
The Effect of Diffraction on the Design of Acoustic Surface Wave Devices
Thomas L. Szabo,A.J. Slobodnik +1 more
TL;DR: In this paper, a complete review of acoustic surface-wave dif- fraction on anisotropic substrates is presented, and the limits of applicability of the parabolic velocity surface theory are quantitatively delineated.