Roberto D. Merlin is an Argentine physicist and Peter A. Franken Collegiate Professor of Physics and Professor of Electrical Engineering and Computer Science at the University of Michigan. He is known, among other things, for his work on quasiperiodic superlattices, squeezed phonons, and, most recently, for the discovery of "superfocusing", a method for creating lenses that can surpass the diffraction limit without using negative refraction materials.