Volume 78, Number 4, May 2007
|Number of page(s)||4|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||27 April 2007|
A method of controlling wave propagation in initially spatially periodic media
Laboratoire d'Acoustique de l'Université du Maine UMR-CNRS 6613 - Av. Olivier Messiaen, 72085 Le Mans Cedex 9, France
2 Laboratoire de Physique de l'Etat Condensé UMR-CNRS 6087 - Av. Olivier Messiaen, 72085 Le Mans Cedex 9, France
Accepted: 27 March 2007
General physical arguments as well as an analytical theory for a particular system indicate that in addition to a traditional method of wave control through gap opening in an allowed frequency band there exists an opportunity to control waves through window opening in a forbidden frequency band. By introducing additional (second) periodicity in an initially periodic material it is possible to guide high-frequency waves in the directions initially forbidden for their propagation.
PACS: 43.35.Gk – Phonons in crystal lattices, quantum acoustics / 42.70.Qs – Photonic bandgap materials / 43.20.Bi – Mathematical theory of wave propagation
© Europhysics Letters Association, 2007
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