Phononics 2013: 2nd International Conference on Phononic Crystals/Metamaterials, Phonon Transport and Optomechanics
	June 2-7 2013, Sharm El-Sheikh, Egypt
		Monday: June 3	Detailed Program Information
		Registration (Amaraua Foyer)	7:30 am - 12:00 pm
		Opening Ceremony (Amaraua Conf. Hall)	7:40 am - 8:00 am
		Track 1: Phononic Crystals
		Session: 1 (Amaraua Conference Hall)	8:00 am - 10:20 pm
		Session Chair:  T.T. Wu
		Author: E. N. Economou	Category: Plenary Talk
		Affiliation: IESL, Foundation for Research and Technology
		Paper #: 0154	Time: 8:00 am -8:30 am
		Title: Manipulating the Flow of Classical Waves: The Case of Phononic Crystals
		Abstract: The appearance of frequency gaps for acoustic and elastic wave in inhomogenous media is examined. Strong resonance scattering (geometric or physical) and destructive inter-ference are the key factors. Some characteristic examples will be presented.
		Author: V. Laude	Category: Plenary Talk
		Affiliation: Institut FEMTO-ST, Université de Franche-Comté and CNRS
		Paper #: 0098	Time: 8:30 am -9:00 am
		Title: Phononic Crystal Diffraction Gratings for Surface and Bulk Acoustic Waves
		Abstract: Phononic crystals built from solid materials and immersed in water make efficient diffraction gratings. In addition to frequency band gaps, phononic crystals of finite thickness support a rich variety of surface acoustic waves and can be optimized for diffraction efficiency, as we illustrate by experiments and calculations.
		Author: J. H. Page	Category: Invited Oral
		Affiliation: Department of Physics and Astronomy, University of Manitoba
		Paper #: 0133	Time: 9:00 am -9:20 am
		Title: Anomalous Ultrasonic Transport through a 2D Phononic Crystal with Competing Bragg and Hybridization Gaps
		Abstract: In 2D phononic crystals of nylon rods surrounded by water, strikingly unusual dispersion effects have been observed, both experimentally and numerically, when both hybridi-zation and Bragg gaps coincide in frequency.  These remarkable characteristics are explained by the competition between two co-existing propagation modes, reflecting strong coupling between scattering resonances of the rods.
		Author: V. Romero-Garcia	Category: Invited Oral
		Affiliation: Universitat Politècnica de València
		Paper #: 0109	Time: 9:20 am -9:40 am
		Title: Unlocked Evanescent Waves in Sonic Crystals
		Abstract: Unlocked evanescent waves in periodic medium are characterized by Bloch modes which wave vector has real part in between the Brillouin zone and non zero imaginary part. Because of these properties, we report here the relevance of the k-space of unlocked evanescent waves in thin semi-infinite fluid-fluid sonic crystal slabs.
		Author: G. Fytas	Category: Invited Oral
		Affiliation: Max Planck Institute for Polymer Research and Department of Materials Science, University of Crete and FORTH
		Paper #: 0158	Time: 9:40 am -10:00 am
		Title: Hypersonic Phononic Band Gap Structures
		Abstract: The study of hypersonic crystals imposes substantial demand on fabrication and characterization techniques. Colloid and polymer science offer methods to create novel materials that possess periodic variations of density and elastic properties at mesoscopic length scales commensurate with the wave length of hypersonic phonons and hence photons of the visible light. Polymer- and colloid-based phononics is an emerging new field at the interface of soft materials science and condensed matter physics with good perspectives ahead. Here, examples from fabricated structures will be highlighted.
		Author: M. M. Sigalas	Category: Invited Oral
		Affiliation: Department of Materials Science, University of Patras
		Paper #: 0037	Time: 10:00 am -10:20 am
		Title: Phononic Band Gaps in Graphene-like Materials and Nanotubes
		Abstract: In this work graphene and graphene-like structures in which some of their atoms are replaced by other group IV atoms are examined. Phononic band gaps in these nanoscale phononic crystals, is studied. Nanotubes were also examined and their similarities with the graphene-like materials were found.
		Coffee Break (Amaraua Foyer)	10:20 am - 10:40 am
		Track 1: Phononic Crystals
		Session: 2 (Amaraua Conference Hall)	10:40 am - 1:00 pm
		Session Chair:  J. Page
		Author: J. O. Vasseur	Category: Invited Oral
		Affiliation: Institut d’Electronique, de Micro-électronique et de Nanotechnologie
		Paper #: 0047	Time: 10:40 am -11:00 am
		Title: Two-dimensional Solid/Solid Phononic Crystal with Multiple Functionalities
		Abstract: A two dimensional solid/solid phononic crystal exhibits a passing band of longitudinal polarization with equifrequency contours of quasi-square shape. Due to this property, peculiar refraction phenomena occur and serve as a basis for new and original functionalities.
		Author: A.-C. Hladky-Hennion	Category: Invited Oral
		Affiliation: IEMN (UMR 8520 CNRS)
		Paper #: 0030	Time: 11:00 am -11:20 am
		Title: Negative Refraction and Focalization of Acoustic Waves   Using a Foam-like Metallic Structure
		Abstract: A phononic crystal (PC) based on a metal structure permeated by air is presented and studied. At low frequency, the structure has water like-density and -longitudinal velocity. At higher frequency, the structure displays a perfect negative index matching with surrounding water and focusing capability. Numerical results and experiments are presented.
		Author: P. H. Otsuka	Category: Invited Oral
		Affiliation: Division of Applied Physics, Faculty of Engineering, Hokkaido University
		Paper #: 0078	Time: 11:20 am -11:40 am
		Title: Mapping Surface Phonons in Phononic Crystals in Real- and k-Space
		Abstract: We investigate gigahertz phonon propagation in a triangular-lattice phononic crystal by time-resolved two-dimensional imaging and by finite element simulations. The effects of exciting different points in the crystal lattice in k-space are revealed by spatiotemporal Fourier analysis. Moreover, the effect of conducting the Fourier analysis at different depths in the sample is elucidated in the numerical simulations.
		Author: O. Matsuda	Category: Invited Oral
		Affiliation: Division of Applied Physics, Faculty of Engineering, Hokkaido University
		Paper #: 0013	Time: 11:40 am -12:00 pm
		Title: Time-resolved Imaging of the Negative Refraction of GHz Surface Acoustic Waves in Phononic Crystals
		Abstract: We investigate the negative refraction of surface acoustic waves at an interface between a two-dimensional phononic crystal and a homogeneous medium with a simulation using the finite element method and with a time-resolved two-dimensional imaging experiment.  Negative refraction in the GHz frequency region is clearly revealed by spatiotemporal Fourier analysis.
		Author: B. Bonello	Category: Invited Oral
		Affiliation: Institut des NanoSciences de Paris (INSP-UMR CNRS 7588)
		Paper #: 0057	Time: 12:00 pm -12:20 pm
		Title: Observation of Localized Cavity Modes in a 2D Phononic Crystal Slab
		Abstract: The confinement of anti-symmetric Lamb modes in a single defect inserted in a 2D silicon/air phononic crystal is measured as a function of both position and time. Posi-tions and relative amplitude of the localized modes well agree with FEM calculations. The dynamics of confinement are deduced from the time dependence.
		Author: T. T. Wu	Category: Org. Colloquium
		Affiliation: 1Institute of Applied Mechanics, National Taiwan University
		Paper #: 0123	Time: 12:20 pm -12:40 pm
		Title: Quartz Phononic Lamb Wave Resonator
		Abstract: In this work, we present results on the design and fabrication of an AT-cut quartz Lamb wave resonator with phononic crystal reflective gratings. The deep reactive ion etching process with a laboratory-made etcher was utilized to fabricate phononic crystal (PC) structures of the AT-cut quartz Lamb wave resonator. The finite element method was adopted to calculate the PC band structure, effective reflective distance from the PC boundary and further the resonant modes and admittance of the phononic Lamb wave resonant cavity. Through the comparison studies between the experimental and simulated results, a design process for the AT-cut quartz phononic Lamb wave resonator was proposed.
		Author: A. Khelif	Category: Org. Colloquium
		Affiliation: Institut FEMTO-ST, 32 avenue de l'Observatoire
		Paper #: 0117	Time: 12:40 pm -1:00 pm
		Title: How Pillar-based Phononic Crystal Controls the Surface Acoustic Waves
		Abstract: It is well known that pillars have internal modal resonances that can be tuned in frequency by design. When they hybridize with the continuum of surface modes of the supporting substrate, they lead to the formation of Fano-like resonances. Depending on the near-field coupling of neighboring pillars, a phenomenon of band repulsion can further be induced. Thus, in addition to Bragg band gaps, frequency band gaps can appear around the local resonances of the pillars. The guidance and the confinement of surface waves through defects are also affected by these resonances as well as the dispersion.
		Lunch Break (Kahramana Resturant)	1:00 pm - 3:30 pm
		Track 1: Phononic Crystals
		Session: 3 (Amaraua Conference Hall)	3:30 pm - 6:30 pm
		Session Chair:  A. Khelif
		Author: Y. S. Wang	Category: Invited Oral
		Affiliation: Institute of Engineering Mechanics,Beijing Jiaotong University, Beijing
		Paper #: 0025	Time: 3:30 pm -3:50 pm
		Title: Method Based on Dirichlet-to-Neumann Map for Band Structure Calculation of Two-dimensional Phononic Crys-tals with Consideration of Interface Effects
		Abstract: A numerical method based on Dirichlet-to-Neumann Map is developed for band structure calculation of two-dimensional phononic crystals. Various interface conditions between the scatterers and host material are considered. Numerical results for a phononic crystal of the nano size are presented; and the interfacial effect is discussed.
		Author: Y. Pennec	Category: Invited Oral
		Affiliation: Institut d’Electronique, de Microélectronique et de Nanotechnologie, Université de Lille
		Paper #: 0062	Time: 3:50 pm -4:10 pm
		Title: Dual Phononic and Photonic Crystal Sensor
		Abstract: We study theoretically dual phononic-photonic (the so-called phoxonic) crystals for liquid sensing applications. We investigate the existence of well-defined features (peaks or dips) in the transmission spectra of acoustic and optical waves and evaluate their sensitivity to the sound and light velocity of the liquid environment.
		Author: S. A. Bhave	Category: Invited Oral
		Affiliation: OxideMEMS Lab, Cornell University
		Paper #: 0132	Time: 4:10 pm -4:30 pm
		Title: Silicon MEMS + Photonic Systems*
		Abstract: In this talk, I will introduce a method for actuating an optomechanical resonator using electrostatic forces and sensing of mechanical motion by using the optical intensity modulation at the output of an optomechanical resonator, integrated into a monolithic system fabricated on a silicon-on-insulator (SOI) platform. I will discuss new applications enabled by this hybrid system including Opto-Acoustic Oscillators (OAO) and inertial sensors.
		Author: N. Z. Swinteck	Category: Contributed Oral
		Affiliation: Department of Materials Science and Engineering, University of Arizona
		Paper #: 0114	Time: 4:30 pm -4:45 pm
		Title: Shear-resonance Modes in 2D and 3D Phononic Structures with Ultra-soft-polymer Host Matrices
		Abstract: In this study we examine the modes of vibration supported by a variety of 2D and 3D elastic phononic crystals (EPCs) comprised of stiff-polymer inclusions and ultra-soft-polymer matrices (matrix materials with transverse speed of sound less-than or equal to 30 m/s). Finite-difference time-domain (FDTD) band structure and displacement field calculations reveal the presence and origin of numerous shear-resonance modes in these types of EPCs. We highlight unique cases of rigid-body rotational resonance as well as hybridization between shear-resonance and bulk transverse modes and attribute these phenomena to the small value of transverse speed of sound for the host matrix material.
		Author: A. A. Kutsenko	Category: Contributed Oral
		Affiliation: Universite de Bordeaux, Institut de Mecanique et d'Ingenierie de Bordeaux
		Paper #: 0029	Time: 4:45 pm -5:00 pm
		Title: Surface Waves in Phononic Crystals
		Abstract: We study SH surface waves in a 2D-periodic half-space with free surface. An explicit form of the dispersion equation f(ω,k)=0 is found. The surface-wave dispersion branches ω (k) are calculated by the new method based on the projector on the space of evanescent modes. Subsonic   and   supersonic   SH   surface waves are observed. The low-frequency asymptotics of the subsonic branch is discussed in detail.
		Author: N. Aravantinos-Zafiris	Category: Contributed Oral
		Affiliation: Department of Materials Science, University of Patras
		Paper #: 0046	Time: 5:00 pm -5:15 pm
		Title: Sonic Strip Waveguide with Phononic Crystal
		Abstract: Using the Finite Difference Time Domain method, we numerically examine the usage of a sonic strip waveguide having a phononic crystal.  This structure could have important applications in acoustic circuits. Different materials, all three polarizations of the input pulse and the effect of all the geometric parameters of the structure were considered for this study. Defected phononic crystal was also included in our calculations.
		Author: J. F. Zhao	Category: Contributed Oral
		Affiliation: Institut des NanoSciences de Paris (INSP-UMR CNRS 7588) Université Pierre et Marie Curie
		Paper #: 0086	Time: 5:15 pm -5:30 pm
		Title: Focalization of the Lowest Order Antisymmetric Lamb Wave with a Gradient-index Phononic Plate
		Abstract: In this work, we report on a study of the lowest antisymetric A0 Lamb wave in a gradient-index phononic crystal plate with a rectangular lattice. The numerical and experimental results demonstrate very close behaviors of wave propagation inside phononic crystal, and both of them show an efficient focalization of the A0 mode wave.
		Author: T. J. Isotalo	Category: Contributed Oral
		Affiliation: Nanoscience Center, Department of Physics, University of Jyväskylä
		Paper #: 0028	Time: 5:30 pm -5:45 pm
		Title: 3D Phononic Colloidal Crystals: Fabrication and Modeling
		Abstract: We have investigated the fabrication and characterization of nano-scale polystyrene colloidal crystals as sub-kelvin 3D phononic materials. A method for integrating simple circuit elements onto colloidal crystal surfaces has been developed. To support experiments, we have performed FEM simulations for various close-packed structures.
		Author: J. H. Park	Category: Contributed Oral
		Affiliation: WCU Multiscale Design Division, Seoul National University
		Paper #: 0012	Time: 5:45 pm -6:00 pm
		Title: Engineering of Phononic Crystals by Topology Optimization
		Abstract: The topology optimization of some unexplored design problems of phononic crystals is presented: self-collimation and periodicity-controlled bandgap maximization. For self-collimation, we aim to design unit cell layouts that propagate non-diffractive waves of narrow beam width. For bandgap maximization, we address the periodicity issue and propose a new formulation.
		Author: S. R. Sklan	Category: Contributed Oral
		Affiliation: Department of Physics, MIT
		Paper #: 0034	Time: 6:00 pm -6:15 pm
		Title: A Magneto-acoustic Approach to Phononic Signal Pro-cessing and Amplification
		Abstract: We formulate a theoretical means of guiding and manipulating phonons. Magneto-acoustic materials, controlled by a suitably sculpted magnetic field, can produce arbitrary linear operations (e.g. gyrations, beam splitting) on transverse phonon currents. A control mechanism (measurement and post-processing) extends this approach to nonlinear operations (e.g. amplifying arbitrarily polarized inputs).
		Author: S. Degraeve	Category: Contributed Oral
		Affiliation: IEMN, Institut d’Electronique, de Microelectronique et de Nanotechnologies
		Paper #: 0148	Time: 6:15 pm -6:30 pm
		Title: Electric Charge Band Gaps in Phononic Crystals
		Abstract: Thononic crystals consist of periodic arrangements of inclusions in a matrix, allowing absolute band gaps. Bragg band gaps are produced by wave scattering at periodic impedance mismatch zones, while hybridization band gaps are generated by periodic arrangements of resonators. A third kind of band gaps is presented here in the case of piezoelectric phononic crystals: electric charge band gaps. They have the property to be highly tunable.
		Adjourn	6:30 PM
		* Optomechanics Talk