Inhomogeneity and Wave

The refractive index determines the path of a wave ray as it travels through a medium. Given a plausible intended wave ray path, the spatial inhomogeneous refractive index can be determined with reverse engineering. Using an inhomogeneous elastic seabed, I successfully developed a broadband wave guide for water waves (Fluids) that without any need for sidewalls can carry wave energy for large distances [8]. In the case of flexural waves (Solids), using spatial inhomogenity in plate’s thickness, I developed a broadband flexural wave lens, and showed a general way to maneuver flexrual waves over a curved trajectory for a broad range of requencies for the purpose of signal transmission.

Publications:

• A. Zareei, A. Darabi, M. Leamy & M.-R. Alam, Continuous Profile Flexural GRIN Lens: Focusing and Harvesting Flexural Waves, Applied Physics Letters 112, 023901 (2018), [PDF]
• A. Darabi, A. Zareei, M. Leamy & M.-R. Alam, Broadband Bending of Flexural Waves: Acoustic Shapes and Patterns, Scientific Reports, 8 (1), 11219, (2018), [PDF]
• A. Zareei & M.-R. Alam, Broadband wall-less waveguide for shallow water waves, arXiv:1812.02221, [PDF]