Phononic Crystals
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. Band Structure in Carbon Nanostructure Phononic Crystals
We investigate the band structure of elastic waves propagating in carbon nanostructure phononic crystals with square, rectangular, triangular, honeycomb and Kagomé lattices. We also study the influence of carbon nanostructure cross section geometry - circular, hollow circular, square and rotated square with a 45° angle of rotation with respect to the x and
Mat. Res.. Publicado em: 27/11/2017
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2. Complete Band Gaps in Nano-Piezoelectric Phononic Crystals
We study the band structure of elastic waves propagating in a nano-piezoelectric phononic crystal consisting of a polymeric matrix reinforced by BaTiO3 inclusions in square, rectangular, triangular, honeycomb and Kagomé lattices. We also investigate the influence of inclusion cross section geometry - circular, hollow circular, square and rotated square with
Mat. Res.. Publicado em: 30/10/2017
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3. Filtros acústicos em cristais fonônicos
In this work, we have studied the acoustic phonon wave propagation within the periodic and quasiperiodic superlattices of Fibonacci type. These structures are formed by phononic crystals, whose periodicity allows the raise of regions known as stop bands, which prevent the phonon propagation throughout the structure for specific frequency values. This p
Publicado em: 2009
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4. Controle e interação de fonons e fotons em fibras opticas de cristal fotonico / Control and interaction of phonons and photons in photonic crystal fibers
Techniques that may allow control and tight confinement of photons and phonons in photonic crystal fibers (PCFs) are investigated in this thesis. By means of robust numerical methods to solve Maxwell equations, a new kind of PCF with a tubular core is proposed. Simulations and experimental results show that such structure is able to confine light tighly insi
Publicado em: 2008