Fig. 4: Single-mode lasing in an individual ZJU-68⊃DPBDM + DMASM + MMPVP hierarchical hybrid microcrystal (R ~1.65 μm). | Light: Science & Applications

Fig. 4: Single-mode lasing in an individual ZJU-68⊃DPBDM + DMASM + MMPVP hierarchical hybrid microcrystal (R ~1.65 μm).

From: Controllable broadband multicolour single-mode polarized laser in a dye-assembled homoepitaxial MOF microcrystal

Fig. 4

a–c Emission spectra of ZJU-68⊃DPBDM (a), ZJU-68⊃DMASM (b), and ZJU-68⊃MMPVP (c) crystal segments around the lasing threshold. Insets: micrographs of ZJU-68⊃DPBDM (a), ZJU-68⊃DMASM (b) and ZJU-68⊃MMPVP (c) crystal segments excited at 480 nm (right), and emission intensity as a function of pump fluence showing a lasing threshold of ~0.660 mJ/cm2 for ZJU-68⊃DPBDM, ~0.610 mJ/cm2 for ZJU-68⊃DMASM, and ~1.72 mJ/cm2 for ZJU-68⊃MMPVP (left). Scale bars, 10 μm. d–f Simulated electric field distributions (square of the electric field intensity) in the hexagonal cavity for the 720 nm (d), 621 nm (e), and 534 nm (f) modes

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