Dylan Wages


Mechanical and Energy Engineering
Dr. Tae Youl Choi
Research Topic: 
Finding Non-Reciprocity in Phononic Crystals Using Surface Roughness
Reciprocity in wave transmission always occurs in a linear medium, but it can be violated by breaking timereversal symmetry (T symmetry) or asymmetry (P symmetry). The purpose of my research is to find non-reciprocity in a phononic crystal using surface roughness, which breaks T symmetry by creating a viscous layer around the rough surface. The idea is to use phononic crystals which is cheap, robust, and does not require an energy source, as a way to create more accurate and less expensive images using ultrasound. Using surface roughness is one of the methods that we are using to tune the phononic crystal.