Resonant plasmon-stimulated nonlinear absorption in three-level systems.

2nd International School and Conference Saint-Petersburg OPEN on Optoelectronics, Photonics, Engineering and Nanostructures

Zasedatelev, A.^1 ; Dubinina, T.^2,4 ; Krasovskii, V.^1,3 ; Suprunova, O.^1 ; Tomilova, L.^2 ; Chistyakov, A.^1

National Research Nuclear University MEPhI, Moscow, Russia^1

Department of Chemistry, M.V. Lomonosov Moscow State University, Moscow, Russia^2

Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia^3

Institute of Physiologically Active Compounds, Russian Academy of Sciences, Chernogolovka, Russia^4

关键词: Electronic systems;    Local-field factors;    Nonlinear absorptions;    Related compounds;    Resonant nonlinearity;    Subphthalocyanines;    Theoretical modeling;    Three level systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/643/1/012049/pdf
DOI  :  10.1088/1742-6596/643/1/012049

来源: IOP

【 摘 要 】

Mechanisms of resonant nonlinear absorption in the hybrid exciton-plasmon systems based on gold nanoparticles and macroheterocyclical compounds are presented. We used novel substituted subphthalocyanines (SubPc) with 14 π-electronic system as powerful excitonic 3 - level systems, and 50 nm gold nanoparticles (AuNp) as plasmonic structures. We succeeded to define mechanisms of resonant nonlinearities and to show that local field factor (LFF) and Purcell factor (PF) lead to dramatic enhancement in SubPc nonlinearity. We suggest a theoretical model which describes exciton-plasmon interaction of porphyrin/phthalocyanine related compounds with gold nanoparticles in the resonant high power laser field.