Fig. 1. Schematic diagram of the experimental setup. The insets are the microscopy images of the HGM filled with DDCLCs and a diglycerol layer (the left inset is an unpolarized image, the right inset is an orthogonal polarized image). Scale bar is 50 μm.

Fig. 2. (a) Emission spectrum of the DDCLC-filled HGM. (b) The emission spectra of the DDCLC-filled HGM as a function of temperature. (c) The wavelength shift of the marked peaks as a function of temperature. The insets of (a) from left to right are, respectively, an unpolarized image, orthogonal polarized image, and excited image of the DDCLC-filled HGM. Scale bar is 20 μm.

Fig. 3. (a) Emission spectrum of a resonator with a well-formed 60 μm diameter DDCLC microdroplet. (b) The relationship between the diameter of DDCLC microdroplet and the FSR of the WGM peaks. The insets of (a) are, respectively, an orthogonal polarized image and an excited image of the resonator. Scale bar is 30 μm.

Fig. 4. (a) Emission spectra of a resonator under different pump intensities. (b) Normalized threshold curve of PBG mode lasing. (c) Normalized threshold curve of WGM lasing.

Fig. 5. (a) Emission spectra of a resonator with a 45 μm DDCLC microdroplet. (b) The wavelength shift of the marked WGM peak as the temperature increases. (c) The wavelength shift of the PBG mode peak as the temperature increases.

Fig. 6. Emission spectra of a resonator excited at different positions. The inset is the schematic diagram of the excitation positions.