Esmaspäeval, 3 sept 2018 kell 14.15 toimub Physicumis W.Ostwaldi 1 seminariruumis D312
Laserspektroskoopia ja Tahkise füüsika ühisseminar No 261
Esineb Siim Pikker, TÜFI
Strong coupling with molecules and molecular aggregates with surface plasmons and Fabry–Pérot type cavities
Understanding the light-matter interactions in the strong coupling regime is one of the fascinating challenges in modern-day optics with possibly intriguing practical applications . The formation of new hybrid light-matter states, called polaritons, enables us to control the energy landscape of the strongly coupled systems. Strong coupling of excitations in semiconductor, molecules and molecular aggregates with highly confined electromagnetic fields have been demonstrated at room temperature for several different types of systems [3-7] even in a single molecule limit . Plasmonic structures and photonic microcavities together with absorbing thin films or isolated molecules have been utilized for these strong coupling experiments.
In this talk I will give a short introduction of the strong coupling phenomena in the optical frequency regime. The main focus will be on the optical strong coupling of molecular aggregates to photonic microcavities and plasmonic systems (thin films, nanostructured surfaces and single plasmonic nanoparticles. I will present some of my latest experimental results including angle and polarization dependent experimental data of photoluminescence of strongly coupled TDBC J-aggregates in a low Q nanocavity realized by silver mirrors. This system has been studied previously by various authors and is well known in the community and therefore a simple and suitable model system for demonstrating the polarization and angle-dependent behavior of its emission properties.
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