Dresden 2014 – wissenschaftliches Programm
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DF: Fachverband Dielektrische Festkörper
DF 2: Optical and nonlinear optical properties, photonic
DF 2.3: Vortrag
Montag, 31. März 2014, 11:10–11:30, GER 37
Optical Modes in Photonic Molecules from Whispering-Gallery-Mode Microcavities — •Tobias Siegle1, Sarah Wiegele1, Carolin Klusmann1, Tobias Großmann1,2, Tobias Wienhold2, Uwe Bog2, Sebastian Köber2,3, and Heinz Kalt1 — 1Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany — 2Institute of Microstructure Technology, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany — 3Institute of Photonics and Quantum Electronics, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany
Optical modes in photonic molecules consisting of microresonators are classified in analogy to quantum mechanics of chemical molecules. Closely approaching two microcavities leads to a photon exchange and subsequent formation of supermodes extending over the entire cavity system.
We used dye (pyrromethene 597)-doped polymeric microresonators to form active photonic molecules. To vary the inter-cavity gap and therefore the photon tunneling rate we developed a setup for flexible arrangement of two cavities, which must inevitably be substrate-overhanging after the manufacturing process. Spatially resolved spectroscopy of two coupled active microdisks and micorgoblets showed the localization of supermodes and a reduction of the number of lasing modes in size-mismatched cavities (Vernier effect) both proving efficient optical coupling.