Fig. 1. Molecular structure of perylene

Fig. 2. The microspheres prepared with different amounts of BYK-180 and schematic diagram of CTAB

Fig. 3. Absorption and emission spectra of Perylene

Fig. 4. Fluorescence spectra of perylene solution and microspheres

Fig. 5. Optical setup for microsphere laseing

Fig. 6. Laser signal of single microsphere

Fig. 7. Laser signal of two microspheres

Fig. 8. Laser signal of multiple microspheres