Friday, October 28, 2016
4:00 p.m. in ETC 4.150
Benjamin C. Treweek
Applied Research Laboratories
The University of Texas at Austin
From its theoretical beginnings to its modern applications in both optics and acoustics, radiation force has received considerable attention. The phenomenon arises due to momentum transfer from an incident wave field—either electromagnetic or acoustic—to a reflecting or absorbing body. In acoustics, much of the recent research on radiation force is focused on its biomedical applications, both therapeutic (e.g., movement of kidney stones) and diagnostic (e.g., soft tissue characterization). In this talk, we will first discuss a brief history of radiation force, touching on a few of its many applications in both optics and acoustics, and we will then examine its governing physical principles, with a particular emphasis on the radiation force on a scatterer embedded in liquid or soft tissue. We will conclude by addressing some recent and future work as it relates to measurement of the shear modulus in soft tissue.