Friday, September 4, 2015 4:00 p.m. in ETC 4.150
Dr. Likun Zhang
Center for Nonlinear Dynamics
Department of Physics, The University of Texas at Austin
Many practical applications, including ultrasound engineering and auditorium acoustics, require formation of sound fields with specific wave fronts. Conventional phased source arrays composed of an array of elementary sources with proper relative phases have been a standard way to form the desired wave fields. However, such arrays have the disadvantages of high cost and complexity in the electronics required to operate the individual sources in the array. This seminar will present schemes that avoid the complexity of conventional phased arrays by manipulating the wave front from a single source using acoustic metastructures that do not themselves contain any source of sound, unlike the conventional phased array with its many individual sources. A metastructure-based passive array is therefore appealing for its simplicity and capability. Metastructure-based passive phased arrays thus find applications where conventional active arrays would be too complex and expensive.