In solid state physics, a bandgap (BG) refers to a range of energies where no electronic
states can exist. This concept was extended to classical waves, spawning the entire fields of …

Phononic crystals have been proposed about two decades ago and some important
characteristics such as acoustic band structure and negative refraction have stimulated …

Phononic crystal is a type of artificial heterogeneous material constituted by a periodic
repetition of cells. This characteristic provides a possible solution to the accurate …

Many efforts have been devoted to the design and achievement of negative-refractive-index
metamaterials since the 2000s,,,,,,,. One of the challenges at present is to extend that field …

Viscoelastic Solids covers the mathematical theory of viscoelasticity and physical insights,
causal mechanisms, and practical applications. The book: presents a development of the …

Acoustic waves in a linear time-invariant medium are generally reciprocal; however,
reciprocity can break down in a time-variant system. In this Letter, we report on an …

Ultrasonics. A subject with applications across all the basic sciences, engineering, medicine,
and oceanography, yet even the broader topic of acoustics is now rarely offered at …

After exactly half a century of Anderson localization, the subject is more alive than ever.
Direct observation of Anderson localization of electrons was always hampered by …

This review discusses recent advances in materials engineering to control thermal
conductivity. We begin by presenting theories of heat conduction for general material …

We explore a phononic crystal Luneburg lens through design, fabrication, and analysis for
omnidirectional elastic wave focusing and enhanced energy harvesting both numerically …