Band Gap and Vibration Reduction Properties of Damped Rail with Two-Dimensional Honeycomb Phononic Crystals

Reflectance properties of two-dimensional sonic band-gap crystals.

An analysis of the reflectance of sonic band-gap crystals consisting of square arrays of rigid cylinders in air is presented. The standing wave formed in front of the structures is studied both experimentally and theoretically. Experiments have been performed with a mobile robotized microphone that obtains pressure maps on the plane perpendicular to the axes of the cylinders. Enhancements of th...

Two-dimensional phononic-photonic band gap optomechanical crystal cavity.

We present the fabrication and characterization of an artificial crystal structure formed from a thin film of silicon that has a full phononic band gap for microwave X-band phonons and a two-dimensional pseudo-band gap for near-infrared photons. An engineered defect in the crystal structure is used to localize optical and mechanical resonances in the band gap of the planar crystal. Two-tone opt...

Honeycomb phononic crystals with self-similar hierarchy

Davood Mousanezhad,1 Sahab Babaee,2 Ranajay Ghosh,1 Elsadig Mahdi,3 Katia Bertoldi,2 and Ashkan Vaziri1,* 1Department of Mechanical and Industrial Engineering, Northeastern University, Boston, Massachusetts 02115, USA 2Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA 3Mechanical and Industrial Engineering Department, Qat...

Topological Design of Cellular Phononic Band Gap Crystals

This paper systematically investigated the topological design of cellular phononic crystals with a maximized gap size between two adjacent bands. Considering that the obtained structures may sustain a certain amount of static loadings, it is desirable to ensure the optimized designs to have a relatively high stiffness. To tackle this issue, we conducted a multiple objective optimization to maxi...

12 Photonic and Phononic Band Gap Properties of Lithium Niobate