Starting in the fall semester 2016/2017, Michael Engel will be MAP Focal Subject Chair for “Computational Materials Science and Process Simulation”. MAP is short for “Advanced Materials and Processes”, an international elite Master’s program funded by the Elitenetzwerk Bayern at the intersection of Materials Science and Chemical Engineering. Interested students can apply here.

Michael Engel made a trip to to USA with a research stay at the University of Michigan, a visit of the Talpin group with seminar at the University of Chicago, and a joint workshop of the University of Minnesota and the Friedrich-Alexander University Erlangen-Nürnberg in Minneapolis.

image002

“We study photonic band gap formation in two-dimensional high-refractive-index disordered materials where the dielectric structure is derived from packing disks in real and reciprocal space. Numerical calculations of the photonic density of states demonstrate the presence of a band gap for all polarizations in both cases. We find that the band gap width is controlled by the increase in positional correlation inducing short-range order and hyperuniformity concurrently. Our findings suggest that the optimization of short-range order, in particular the tailoring of Bragg scattering at the isotropic Brillouin zone, are of key importance for designing disordered PBG materials.”

Role of Short-Range Order and Hyperuniformity in the Formation of Band Gaps in Disordered Photonic Materials
L.S. Froufe-Perez, M. Engel, P.F. Damasceno, N. Muller, J. Haberko, S.C. Glotzer, F. Scheffold
Physical Review Letters 117, 053902 (2016)