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HL: Fachverband Halbleiterphysik

HL 21: Symposium: Artificial Optical Materials (SYOM)

HL 21.1: Hauptvortrag

Montag, 14. März 2011, 14:30–15:00, HSZ 01

Photonic Metamaterials and Transformation Optics: Recent Progress — •Martin Wegener — Karlsruhe Institute of Technology (KIT), DFG-Center for Functional Nanostructures (CFN), 76128 Karlsruhe, Germany

Metamaterials are artificial materials composed of sub-wavelength building blocks that are densely packed into an effective material. This concept allows for achieving effective optical properties that are not accessible in natural substance. In 2007, negative-index metamaterials have reached visible operation frequencies. Today, taking advantage of progress in three-dimensional nanofabrication, photonic metamaterials have even become truly three-dimensional. However, the reduction of metal losses still poses a major challenge. In this talk, I will start with a brief overview and then emphasize recent results of our group such as, e.g., (i) adding semiconductor quantum well gain and (ii) designing/fabricating/characterizing three-dimensional invisibility cloaking structures operating at visible frequencies. The latter has only become possible by using diffraction-unlimited optical lithography in three dimensions - the counterpart of STED fluorescence microscopy.