Related Experiment Video
Updated: Jun 5, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
Analysis of elastic waves transmitted through a 2-D phononic crystal exhibiting negative refraction
Charles Croënne1, Bruno Morvan, Jérôme Vasseur
1Institut d’Electronique, de Microelectronique, et de Nanotechnologie, Lille, France.
Abstract:
A two-dimensional phononic crystal (PC) made of a square lattice of air holes in an aluminum matrix is studied. The band structure calculated in the irreducible Brillouin zone of the PC exhibits a branch with a negative slope that allows negative refraction. This phenomenon has been numerically verified using a prism-shaped PC for plane waves entering the PC with two different incidences. A detailed study of the waves at the exit of the PC shows that the plane wave is reconstructed after several wavelengths. Finally, the description of the refracted waves is interpreted using a point source array, giving information about the angular spreading and the relative amplitude of each refracted beam.
Related Concept Videos
Standing Waves in a Cavity
Interference and Diffraction
The de Broglie Wavelength
Determination of Crystal Structures
Reflection of Waves
X-ray Crystallography
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...

