Assoc. Prof. Dr. Sinan Balcı
Türk Hava Kurumu Üniversitesi
Engineering light−matter interaction at the nanoscale dimension has attracted a surge of interest in recent years owing to the direct impact of the studies on solar cells, plasmonic circuits, nanoscale light sources, quantum optics, etc. The advancements in top-down and bottom-up nanofabrication techniques as well as the ability to synthesize metallic and semiconducting quantum dots with size and shape tunable optical properties have been enabling us to precisely control and deeply understand light–matter interaction at nanoscale dimensions. In order to engineer light–matter interactions, plasmonic systems have been merged with excitonic systems. A new hybrid plasmon–exciton mode called plexciton has been observed.
The field of plexcitonics needs colloidally stable plexcitonic nanoparticles with tunable optical properties in the visible region in order to boost the performance of plasmonic devices, and precisely control light-matter interaction at nanoscale dimension. In our group, we demonstrated colloidaly stable plexcitonic nanoparticles with giant Rabi spliting energies, 400 meV.1 Rabi splitting energy of the plexcitonic nanoparticles can be tunable from the weak to ultrastrong coupling regimes.2 We are further able to strongly couple the plexcitons with propagating surface plasmon modes. The hybridization of the localized plexcitons with the propagating plasmons results in a new excitation that we called a plexcimon.3 The plexcimons exhibit an interesting dispersion relation that is reminescent of a coupled resonator optical wavequide (CROW).
1. Balci, S. Opt Lett 38, 4498 (2013).
2. Balci, S. et al., ACS Photonics (2016).
3. Balci, S. et al., Opt Lett 40, 3424 (2015).
Yer: Fen Fakültesi, Kimya Bölümü Seminer Salonu
Tarih: 14 Kasım 2016, Pazartesi