Fig. 5: Robust exciton-photon coupling and lasing in 2D perovskite nanowires. | Nature Communications

Fig. 5: Robust exciton-photon coupling and lasing in 2D perovskite nanowires.

From: Two-dimensional organic-inorganic hybrid perovskite quantum-well nanowires enabled by directional noncovalent intermolecular interactions

Fig. 5

a Polarization dependent PL emission of a (DFPD)2PbI4 showing a degree of polarization up to 80%. Inset is the optical image of the microwire, indicating the alignment. Scale bar is 10 μm. b Spatially resolved photoluminescence (PL) spectra collected from the end of three NWs: (PMA)2PbI4, (MBA)2PbI4, and (PMA)2(MA)Pb2I7. Scale bars are 2 μm. c Dispersion curves for the three NWs. The dots are the experimental data, the solid lines are the fitting dispersion curves of the polaritons, and dashed lines are the dispersion curves of the photons or excitons. d Statistics of the Rabi splitting energy of 3D perovskite NWs and various 2D perovskite quantum-well NWs. SD represents the standard deviation, and IQR represents the interquartile range. e 2D color plot of the emission spectra of a (PMA)2(MA)Pb2I7 NW under different pump fluences. Inset shows the plots of integrated PL emission intensity and FWHM of the emission peaks versus the pump fluences. f Lasing emission spectra of various NWs of 2D perovskites with n > 1. Insets are the optical images of the NWs above the lasing thresholds, showing interference. Scale bars are 1 μm.

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