Flat Nanophotonics: Controlling Light at the Nanoscale with Plasmonics and Metasurfaces

Dr. Koray Aydin, Northwestern University
March 20, 2017 at 11:00 am
241 Compton
Event Description 

Nanophotonic materials and devices facilitate strong light-matter interactions at subwavelength scales, thus providing unique opportunities to control and manipulate photons. In this talk, I will present visible frequency metasurfaces for broadband phase control and anomalous reflection, spectrum splitting using metallic metasurfaces enabled by phase engineering at the subwavelength scale. I will also present two different approaches for obtaining narrow-band resonant absorption filters at visible wavelengths. First structure is based on the surface lattice resonances in periodic nanowire and nanoring arrays fabricated on a reflecting metallic substrate. As a second approach, I will briefly mention strong interference effects in unstructured continuous metal-insulator-metal filters. Enhanced photoluminescence enhancement from a single monolayer MoS2 via plasmonic nanostructures will also be discussed. 2D layered materials received great attention due to their unique optical, electrical and mechanical properties however, due to their thickness light-matter interactions is rather weak. We utilize plasmonic nanostructures to strongly enhance electric fields locally at subwavelength scales therefore facilitating increased light emission and absorption in 2D semiconducting materials.