A new paradigm for active nanophotonic structures and metadevices based on perovskites has recently emerged due to several unique features of these materials such as room-temperature exciton, tunable bandgap energy, and low-cost fabrication methods [1,2]. Progress towards future applications requiring dynamical control of the optical response will depend on our understanding of photoexcitations in these systems [3,4]. In this work, we report the first experimental observation of ultrafast all-optical modulation of Fano resonant halide perovskite nanoparticles (NP). Our measurements, corroborated by analytical and numerical models, show that the out-of-equilibrium dynamics of these systems can be thoroughly controlled by engineering the NP size.
Carletti, L., Franceschini, P., Perri, A., Preda, F., Polli, D., Tognazzi, A., De Angelis, C., Banfi, F., Pagliara, S., Ferrini, G., Pushkarev, A. P., Makarov, S. V., Giannetti, C., Ultrafast all-optical tuning of fano resonant halide perovskite nanoparticles, Abstract de <<2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019>>, (Munich, Germany, 23-27 June 2019 ), Institute of Electrical and Electronics Engineers Inc., NEW YORK -- USA 2019: 1-1. 10.1109/CLEOE-EQEC.2019.8871638 [http://hdl.handle.net/10807/146070]
Ultrafast all-optical tuning of fano resonant halide perovskite nanoparticles
Franceschini, P.;Tognazzi, A.;Banfi, F.;Pagliara, S.;Ferrini, G.;Giannetti, C.
2019
Abstract
A new paradigm for active nanophotonic structures and metadevices based on perovskites has recently emerged due to several unique features of these materials such as room-temperature exciton, tunable bandgap energy, and low-cost fabrication methods [1,2]. Progress towards future applications requiring dynamical control of the optical response will depend on our understanding of photoexcitations in these systems [3,4]. In this work, we report the first experimental observation of ultrafast all-optical modulation of Fano resonant halide perovskite nanoparticles (NP). Our measurements, corroborated by analytical and numerical models, show that the out-of-equilibrium dynamics of these systems can be thoroughly controlled by engineering the NP size.
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