TITLE

Localization of acoustic modes in periodic porous silicon structures

AUTHOR(S)
Lazcano, Zorayda; Meza, Octavio; Arriaga, Jesús
PUB. DATE
December 2014
SOURCE
Nanoscale Research Letters;Dec2014, Vol. 9 Issue 1, p1
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The propagation of longitudinal acoustic waves in multilayer structures based on porous silicon and the experimental measurement of acoustic transmission for the structures in the gigahertz range are reported and studied theoretically. The considered structures exhibit band gaps in the transmission spectrum and these are localized modes inside the band gap, coming from defect layers introduced in periodic systems. The frequency at which the acoustic resonances appear can be tuned by changing the porosity and/or thickness of the defect layer.
ACCESSION #
100300789

 

Related Articles

  • Quantum confinement of CdSe nanocrystals in CdSe/Se multilayer thin films. David Kumar, M.; Devadason, Suganthi // Applied Physics A: Materials Science & Processing;Jan2013, Vol. 110 Issue 1, p87 

    CdSe/Se multilayer thin films were prepared using sequential thermal evaporation technique by varying the thickness of selenium sublayers. Identifying the prominent peaks observed in the XRD spectra of the top layer CdSe which corresponds to the (100) plane with wurtzite structure, the average...

  • Some Structural Properties Studying of Porous Silicon Preparing by Photochemical Etching. AL-Tememee, Nathera Abass Ali // International Review of Physics;Feb2012, Vol. 6 Issue 1, p102 

    Porous silicon (PSi) has been produced in this work by using photochemical (PC) etching process by using a hydrofluoric acid (HF) solution. The irradiation has been achieved using quartz tungsten halogen lamp. The influence of various irradiation times on the properties of Psi material such as...

  • Investigation the effect of lattice angle on the band structure in 3D phononic crystals with rhombohedral(II) lattice. Aryadoust, M.; Salehi, H. // Applied Physics A: Materials Science & Processing;Dec2014, Vol. 117 Issue 4, p2037 

    In this paper, the propagation of acoustic waves in the phononic crystals (PC) of 3D with rhombohedral(II) lattice is studied theoretically. The PC are constituted of nickel spheres embedded in epoxy. The calculations of the band structure and density of states are performed with the plane wave...

  • Acoustic wave characterization of silicon phononic crystal plate. Duan Feng; Wanli Jiang; Dehui Xu; Bin Xiong; Yuelin Wang // Applied Physics Letters;8/31/2015, Vol. 107 Issue 9, p1 

    In this paper, characterization of megahertz Lamb waves in a silicon phononic crystal based asymmetry filter by laser Doppler vibrometer is demonstrated. The acoustic power from a piezoelectric substrate was transmitted into the silicon superstrate by fluid coupling method, and measured results...

  • Acoustic waves switch based on meta-fluid phononic crystals. Zhu, Xue-Feng // Journal of Applied Physics;Aug2012, Vol. 112 Issue 4, p044509 

    The acoustic waves switch based on meta-fluid phononic crystals (MEFL PCs) is theoretically investigated. The MEFL PCs consist of fluid matrix and fluid-like inclusions with extremely anisotropic-density. The dispersion relations are calculated via the plane wave expansion method, which are in...

  • Numerical investigation of diffraction of acoustic waves by phononic crystals. Moiseyenko, Rayisa P.; Declercq, Nico F.; Laude, Vincent // AIP Conference Proceedings;5/24/2012, Vol. 1433 Issue 1, p319 

    Diffraction as well as transmission of acoustic waves by two-dimensional phononic crystals (PCs) composed of steel rods in water are investigated in this paper. The finite element simulations were performed in order to compute pressure fields generated by a line source that are incident on a...

  • Blazed phononic crystal grating. Moiseyenko, Rayisa P.; Liu, Jingfei; Declercq, Nico F.; Laude, Vincent // Applied Physics Letters;1/21/2013, Vol. 102 Issue 3, p034108 

    It is well known that blazed optical diffraction gratings can significantly increase the diffraction efficiency of plane waves for a selected angle of incidence. We show that by combining blazing with a phononic band gap, diffraction efficiency approaching 100% can be achieved for acoustic...

  • Complete three-dimensional band gap in macroporous silicon photonic crystals. Leonard, S. W. // Applied Physics Letters;10/14/2002, Vol. 81 Issue 16, p2917 

    The prospect of obtaining a complete three-dimensional band gap in macroporous silicon photonic crystals is investigated theoretically. Band structure calculations indicate that a modified form of the simple cubic lattice of air spheres in silicon exhibits a complete band gap, with a bandwidth...

  • Acoustic Wannier-Stark ladders and Bloch oscillations in porous silicon structures. Lazcano, Z.; Arriaga, J. // Applied Physics Letters;12/8/2014, Vol. 105 Issue 23, p1 

    We report the experimental observation of the Wannier-Stark ladders and the Bloch oscillations for acoustic waves in porous silicon structures. We designed and fabricated a structure with an acoustic band gap centered around 1 GHz. We introduced a linear gradient in the acoustical parameter η...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics