Invisibility Cloaks

A cloak is two- or three-dimensional patch that encloses an object (to be made invisible), and is designed to direct the waves around the central object, shielding that region or object from incident waves, and hence making it invisible. During my Ph.D., I developed a nonlinear transformation to create cloaks with reduced material complexities i.e., using layers of homogeneous material. Using this nonlinear transformation, I successfully designed and numerically/experimentally validated broadband invisibility cloaks for (i) surface gravity waves (Fluids) in shallow water/finite depth, and also for (ii) flexural waves (Solids).

Publications:

• A. Zareei & M.-R. Alam, Perfect cloaking in shallow water waves via nonlinear medium transformation, Journal of Fluid Mechanics, 778, pp 273-287, [PDF]
• A. Zareei & M.-R. Alam, Broadband Cloaking of Flexural Waves, Physical Review E, 95.6 (2017): 063002, [PDF, arXiv]
• A. Darabi, A. Zareei, M.-R. Alam & M. Leamy, Experimental Demonstration of an Ultra Broadband Nonlinear Transformation Cloak for Flexural Waves, Physical Review Letters, 121.17 (2018): 174301, [PDF]
• A. Zareei & M.-R. Alam, Cloaking by a Floating Thin Plate, IWWWFB (2016), [PDF]