LC lasing from the printed microunit. (a) Sketch of an individual LC microlaser. (b) Transmission spectra of the CLCs doped with and without the dye and PL spectrum of the dye in ethanol. The concentration of the dye is 0.01 mM. Inset: the molecular structure of the dye. (c) PL spectra of an individual microunit under different pump fluences. Inset: PL image of the corresponding microunit. Scale bar: 50 μm. (d) Plots of the PL peak intensity and the FWHM of the microunit vs. the pump fluence.