Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

PV: Plenarvorträge

PV XXII

PV XXII: Preisträgervortrag

Donnerstag, 23. März 2017, 13:15–13:45, HSZ 03

Controlling Light Fields with Mie-Resonant Dielectric Metasurfaces — •Isabelle Staude — Friedrich Schiller University, Jena, Germany --- Laureate of the Hertha-Sponer-Prize

High-refractive-index dielectric nanoresonators can support strong multipolar Mie-type resonances while exhibiting very low absorption losses at optical frequencies. Using the capabilities of modern nanotechnology, these resonances can be tuned by the size, shape, material composition, and environment of the nanoresonators. Thus, carefully designed dielectric nanoresonatos can be employed as building blocks of resonant metasurfaces with tailored linear and nonlinear optical properties. This talk will review our recent advances in light-field control with dielectric metasurfaces using silicon nanodisks as nanoresonators. It will focus on metasurfaces designed to impose a spatially variant phase shift onto an incident light field, thereby providing control over its wave front. Based on the simultaneous excitation of electric and optically-induced magnetic dipole resonances, the nanoresonators can be tailored to emulate the behavior of the forward-propagating elementary wavelets known from Huygens' principle. This concept allows for the experimental realization of metasurfaces with high transmittance efficiency, full phase coverage, and a polarization insensititve response at telecom frequencies. Various examples of wavefront control will be discussed, including beam shaping and holographic imaging.