Phononics 2011: International Conference on Phononic Crystals, Metamaterials and Optomechanics
	May 29-June 2 2011, Santa Fe, New Mexico, USA
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		Thursday: June 2	Detailed Program Information
		Registration (Chamisa)	7:30 am - 12:00 pm
		Announcements (Mesa BR)	8:15 am - 8:30 am
		Track 6: Fabrication and Characterization for Phononics
		Session: 14 ( Ortez Ballroom)	8:30 am - 10:15 am
		Session Chair:  F. McCormick
		Author: G. Bogart	Category: Plenary Talk
		Paper #: 0075	Time: 8:30 am -9:00 am
		Title: Larger Scale Fabrication of Nanometer to Micron Sized Periodic Structures in 2D and 3D: Approaches and Trends
		Abstract: Fabrication of periodic structures for photonic or phononic wavelength interaction and manipulation at the small scale (<100um x 100 um) in planar dimensions using a variety of materials and techniques has been documented in the literature. Often structures are conceived and built with only a single device needing to be made. Some applications require that structures be fabricated in three dimensions or with multiple layers placing additional constraints on the fabricator.
		Author: G. Piazza	Category: Keynote Talk
		Paper #: 0105	Time: 9:00 am -9:25 am
		Title: Microfabricated GHz Phononic Band Gap Structures
		Abstract: This paper reports the latest development on the synthesis of phononic band gaps (PBG) in AlN/Air and SiC/Air structures operating in the GHz range by means of inverted cylindrical geometries or fractal-based designs. Finite element methods used to design and confirm the PBG dispersion curve and amplitude-frequency response are also presented.
		Author: D. Schneider	Category: Keynote Talk
		Paper #: 0131	Time: 9:25 am -9:50 am
		Title: High Frequency Soft Phononics
		Abstract: Propagation of hypersonic elastic/acoustic waves in polymer- and colloid-based nanostructures emerges as a powerful characterization tool of thermo- mechanical properties and reveals new structure related collective phenomena .Particle vibration spectroscopy and engineering of the phonon dispersion band diagram are highlighted in this presentation.
		Author: Z. C. Leseman	Category: Org. Colloquium
		Paper #: 0125	Time: 9:50 am -10:15 am
		Title: Fabrication of 2-D Phononic Crystals via Focused Ion Beam
		Abstract: A technique for the fabrication of 2-D Phononic Crystals (PnCs) is described that utilizes a focused ion beam (FIB) instrument. In particular, the details of the microfabrication procedure are discussed which creates the main structure from which the PnC is created. Following the microfabrication is the nanoFIBrication of the microstructure to create a PnC with nanoscale features. Results will be presented for the fabrication of a 33 GHz PnC.
		Coffee Break (Chamisa)	10:15 am - 10:40 am
		Track 7: Phononic MEMS and RF Applications
		Session: 15 (Ortez Ballroom)	10:40 am - 12:25 pm
		Session Chair:  A. Khelif
		Author: A. Adibi	Category: Plenary Talk
		Paper #: 0179	Time: 10:40 am -11:10 am
		Title: A Waveguide-based Phononic Crystal Micro/Nano-mechanical High-Q Resonator
		Abstract: In this paper, we report the design, analysis, fabrication, and characterization of a very high frequency (VHF) phononic crystal (PnC) micro/nano mechanical resonator architecture based on silicon (Si) PnC slab waveguides. The PnC structure completely surrounds the resonant area and the resonator is excited by a thin aluminum nitride-based piezoelectric transducer stack directly fabricated on top of the resonator. This architecture highly suppresses the support loss of the resonator to the surroundings while providing mechanical support and electrical signal delivery to the resonator.
		Author: Y. Pennec	Category: Keynote Talk
		Paper #: 0054	Time: 11:10 am -11:35 am
		Title: Band Gaps and Defect Modes in Phononic Strip Waveguides
		Abstract: We study the elastic wave propagation in different geometries of strip waveguides obtained by extracting a row out of a phononic crystal slab made up of a square array of air holes in a silicon plate. We show that the existence of band gaps is strongly dependent on the cutting direction. We also study the existence of localized modes in cavities inserted inside the perfect strip waveguides.
		Author: J. Vasseur	Category: Keynote Talk
		Paper #: 0053	Time: 11:35 am -12:00 pm
		Title: Tunable magnetoelastic phononic crystals
		Abstract: The feasibility of contactless tunability of the band structure of two dimensional phononic crystals is demonstrated by employing magnetostrictive materials and applying an external magnetic field. The influence of the amplitude and of the orientation with respect to the inclusion axis of the applied magnetic field are studied in details. Applications to tunable selective frequency filters are discussed.
		Author: I. E. Psarobas	Category: Keynote Talk
		Paper #: 0070	Time: 12:00 pm -12:25 pm
		Title: Multi-phonon Processes in PhoXonic Cavities
		Abstract: Long lifetime photons and phonons, confined in the same region of space, inside a phoXonic cavity, can interface with each other via strong nonlinear acousto-optic interactions. We unveil physics of distinct importance as the hypersonic modulation of light is substantially enhanced through multi-phonon exchange mechanisms.
		Author: R. H. Olsson	Category: Org. Colloquium
		Paper #: 0122	Time: 12:25 pm -12:50 pm
		Title: Micromachined Phononic Band-Gap Crystals and Devices
		Abstract: Micromachined phononic crystals are an emerging technology with applications in radio frequency communications, sensors and thermal energy harvesting. This paper presents work at Sandia National Laboratories in the realization of micromachined phononic crystal devices across a broad frequency range and in a number of material systems.
		Lunch Break (Chamisa)	12:50 pm - 2:00 pm
		Parallel Sessions
		Track 1 & 4: Phononic Crystals & Phonon Transport
		Session: 17 (Ortez Ballroom A)	2:00 pm - 3:30 pm
		Session Chair:  A. Adibi
		Author: S. Alaie	Category: Contrib. Oral
		Paper #: 0152	Time: 2:00 pm -2:15 pm
		Title: On the Validity of 2D Numerical Simulation of Bandgap for Slab of Phononic Crystals
		Abstract: This work suggests a criterion for verification of Phononic bandpaps simulated by two dimensional elastodynamic models. The bandgap of a phononic crystals (PnCs) was studied using both 2D and 3D finite element analyses. Comparing the numerical results with experiment, this study indicates that validity of 2D models depends on the ratio of the thickness to the excitation wavelength.
		Author: R. A. Wildman	Category: Contrib. Oral
		Paper #: 0147	Time: 2:15 pm -2:30 pm
		Title: Multi-Objective Optimization of Phononic Bandgap Materials for Wide Band, Low Frequency Operation
		Abstract: Phononic bandgap materials are optimized for maximization of bandgap size and minimization of center frequency using a genetic programming method for inclusion shape design and material choice. Maximizing the bandgap size allows for a material design that can block a wide range of frequencies. Minimizing the center frequency will give designs that are small compared to the effective wavelength.
		Author: M. V. Golub	Category: Contrib. Oral
		Paper #: 0072	Time: 2:30 pm -2:45 pm
		Title: Propagation and Transmission of Elastic SH-Waves in Functionally Graded Phononic Crystals
		Abstract: The boundary value problem of elastic SH-wave propagation in one-dimensional phononic crystals composed of functionally graded interlayers arisen from the solid diffusion of homogeneous isotropic material of the crystal is considered. The localization phenomena, transmission and band gaps due to the material gradation are investigated.
		Author: F. Scarpa	Category: Contrib. Oral
		Paper #: 0022	Time: 2:45 pm -3:00 pm
		Title: Band-gap Acoustic States in 1D and 2D Single Layer Graphene Sheet Systems
		Abstract: We evaluate the pass-stop band characteristics of mechanical wave propagating in periodic nanostructures made with nanoribbons or graphene sheets with non-reconstructed defects..
		Author: R. J. Magyar	Category: Contrib. Oral
		Paper #: 0046	Time: 3:00 pm -3:15 pm
		Title: Divide and Conquer Quantum Mechanical Methods for Phononic Applications
		Abstract: Density functional theory is a highly efficient computational framework that describes structural properties of materials such as phonon frequencies and densities of states. In this talk, we suggest how the divide and conquer scheme may be well suited to determine phononic response in materials with supermolecular scale features.
		Author: M. W. Blair	Category: Contrib. Oral
		Paper #: 0145	Time: 3:15 pm -3:30 pm
		Title: Improved Lattice-Bath Phonon Relaxation in Nanoscale Oxides
		Abstract: Electron paramagnetic resonance (EPR) spectroscopy has been used to study energy transport properties of bulk and nanophosphor oxyorthosilicate samples. The bulk samples displayed a slight phonon bottleneck while energy relaxation in the nanophosphor samples was not influenced by the lattice-bath relaxation time and was more rapid.
		Coffee Break (Chamisa)	3:30 pm - 3:55 pm
		Track 4: Phonon Transport
		Session: 18 (Ortez Ballroom A)	3:55 pm - 4:40 pm
		Session Chair:  Z. C. Leseman
		Author: P.-O. Chapuis	Category: Contrib. Oral
		Paper #: 0049	Time: 3:55 pm -4:10 pm
		Title: Heat dissipation in silicon and quartz nanoridges
		Abstract: We have investigated experimentally the effect of confinement of thermal acoustic phonons in 100 nm large ridges of silicon and quartz. We quantify the deviation to Fourier and ballistic predictions as a function of two characteristic numbers, the constriction Knudsen number describing the transmission of the phonons and a dimensionless number based on the nanoridges volume/surface ratio.
		Author: F. Alzina	Category: Contrib. Oral
		Paper #: 0094	Time: 4:10 pm -4:25 pm
		Title: Dispersion of Confined Acoustic Phonons in Ultra-Thin Si Membranes
		Abstract: The dispersion curves of confined acoustic phonons in ~10 and ~30 nm Si membranes were measured using Brillouin Light Scattering (BLS) spectroscopy. The dispersion relations of the confined phonons were calculated from a semi-analytical model based on continuum elasticity theory. Green’s function simulations were used to simulate the Brillouin spectra.
		Author: M. Prunnila	Category: Contrib. Oral
		Paper #: 0103	Time: 4:25 pm -4:40 pm
		Title: Acoustic Phonon Transmission and Heat Conduction Through Vacuum
		Abstract: We describe theoretically how acoustic phonons can directly transmit energy and conduct heat between bodies that are separated by a vacuum gap. This effect is enabled by introducing a coupling mechanism, such as piezoelectricity, that strongly couples electric field and lattice deformation.
		Track 2: Periodic Structures
		Session: 19 (Ortez Ballroom B)	2:00 pm - 3:30 pm
		Session Chair:  R. H. Olsson III
		Author: A. Leonard	Category: Contrib. Oral
		Paper #: 0030	Time: 2:00 pm -2:15 pm
		Title: Tailoring Stress Waves in 2-D Highly Nonlinear Granular Crystals: Simulations and Experiments
		Abstract: We study the propagation of elastic stress waves in two-dimensional highly nonlinear granular crystals composed of square packings of spheres with and without cylindrical intruders, via experiments and numerical simulations. By varying the intruder material, we show the ability to alter the propagating wave front characteristics. Experiments agree well with discrete particle simulations.
		Author: G. Theocharis	Category: Contrib. Oral
		Paper #: 0079	Time: 2:15 pm -2:30 pm
		Title: Control of Vibrational Energy in Nonlinear Granular Crystals
		Abstract: We describe recent work on nonlinear granular crystals. We explore phenomena related to vibrational energy localization, re-distribution, and rectification enabled by the spatial discreteness, disorder, and nonlinearity of granular crystals. In addition, we note how an understanding of dynamic phenomena in granular crystals can enable the design of novel engineering devices.
		Author: V. J. Sánchez-Morcillo	Category: Contrib. Oral
		Paper #: 0098	Time: 2:30 pm -2:45 pm
		Title: Second harmonics, instabilities and hole solitons in 1D phononic granular chains
		Abstract: The propagation of nonlinear compressional waves in a 1D compressed granular chain driven at one end by a harmonic excitation is theoretically studied. The chain is described by a FPU lattice model with quadratic nonlinearity. We predict and describe different nonlinear phenomena, as the generation of second harmonics, modulational instabilities and the existence of hole (or dark) solitons.
		Author: G. Wang	Category: Contrib. Oral
		Paper #: 0067	Time: 2:45 pm -3:00 pm
		Title: Broadband Vibration Attenuation Induced by Periodic Arrays of Feedback Shunted Piezoelectric Patches on Beams
		Abstract: The effect of periodic arrays of feedback shunted piezoelectric patches in vibration attenuation of flexible beams is analyzed theoretically and experimentally. Broadband vibration attenuations are observed no mater in or out of the band gaps. The proposed concept is validated experimentally on a suspended epoxy beam.
		Author: Y. Xiao	Category: Contrib. Oral
		Paper #: 0148	Time: 3:00 pm -3:15 pm
		Title: Longitudinal Vibration Band Gaps in Rods with Periodically Attached Multi-Degree-of-Freedom Vibration Absorbers
		Abstract: Band gap behavior in rods with periodically mounted multi-degree-of-freedom resonators (vibration absorbers) is concerned. Explicit expressions are derived for the calculation of complex band structures. The effects of absorber parameters on the band gap properties are studied. The band gap formation mechanisms of the system are explained by analytical models with explicit formulations.
		Author: S.  Chen	Category: Contrib. Oral
		Paper #: 0031	Time: 3:15 pm -3:30 pm
		Title: Active Control of Band Gaps by Periodically Distributed Piezo-shunts
		Abstract: Periodic arrays of inductive or negative capacitive shunted piezoelectric patches are employed to control the band gaps of phononic beams. An epoxy beam with periodically surface- bonded piezoelectric patches is designed. The band gaps, when each piezo-patch is connected to a single inductive or negative capacitive circuit, are investigated in detail.
		Coffee Break (Chamisa)	3:30 pm - 3:55 pm
		Track 6: Fabrication and Characterization for Phononics
		Session: 20 (Ortez Ballroom B)	3:55 pm - 4:40 pm
		Session Chair:  M. F. Su
		Author:  T. J. Isotalo	Category: Contrib. Oral
		Paper #: 0143	Time: 3:55 pm -4:10 pm
		Title: Techniques for Self-Assembled Phononic Crystals
		Abstract: In this project, we study the assembly of periodic arrays of nanospheres and their crystalline properties. The vertical deposition technique is investigated along with the effects of substrate surface modifications for improvement of order and directed self-assembly. Dipping speed and PS sphere concentration are taken as the primary parameters affecting crystalline quality.
		Author: D. F. Goettler	Category: Contrib. Oral
		Paper #: 0151	Time: 4:10 pm -4:25 pm
		Title: The Effect of Phononic Crystal Lattice Type and Lattice Spacing on the Reduction of Bulk Thermal Conductivity in Silicon and Silicon Nitride
		Abstract: Phononic crystals are a promising method of reducing a material’s bulk thermal conductivity. Changing a phononic crystal’s lattice type or its lattice spacing are two ways of reducing a material’s thermal conductivity. Results of different lattice types and lattice spacings on the reduction of bulk thermal conductivity in silicon and silicon nitride at room temperature will be presented.
		Author: D. Lanzillotti-Kimura	Category: Contrib. Oral
		Paper #: 0158	Time: 4:25 pm -4:40 pm
		Title: Nanophononics using Acoustic and Optical Cavities
		Abstract: We report pump-probe time experiments in acoustic and optical cavities. We demonstrate that the generated coherent acoustic phonon spectra can be inhibited or enhanced in the cavity.  Simulations highlight the role of the phonon density of states in the coherent phonon generation, extending concepts at the base of the Purcell effect to the field of phononics.
		Adjourn	4:40 PM