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HL: Fachverband Halbleiterphysik

HL 17: Plasmonic Systems

HL 17.6: Vortrag

Montag, 26. März 2012, 16:15–16:30, EW 203

Optical properties of metal-organic hybrid microcavities — •Robert Brückner, Markas Sudzius, Susanne Hintschich, Hartmut Fröb, Vadim Lyssenko, and Karl Leo — Institut für Angewandte Photophysik, Technische Universität Dresden, D-01062 Dresden, Germany

We investigate the impact of the incorporation of a thin silver layer into a planar dielectric microcavity (MC). The MC is composed of a λ/2-layer of the organic media Alq₃ doped with 2wt% DCM sandwiched between two dielectric distributed Bragg reflectors (21 alternating layers of TiO₂ and SiO₂). Using a µ-photoluminescence setup, we systematically study the transition from a single cavity mode into two optical Tamm states depending on the thickness of the embedded silver layer [1]. Even for a silver layer of 40 nm thickness both new modes are only slightly damped, enabling lasing in these metal organic hybrid devices. The eigenenergies of these modes strongly depend on both the thickness of the silver layer and the adjacent dielectric layers. We show that both resonances cannot have the same wavelength indicating a clear anticrossing behavior. We confirm the experimentally observed shift and splitting of the cavity mode into two anticrossing resonances via transfer matrix calculations.

R. Brückner, et al. Phys. Rev. B, 83, 033405 (2011).