Fig. 5

Cross-sectional microscopic images of the fabricated elliptical microcavities by the microcone-shaped fiber tip at laser powers of (a) 20 mW, (b) 40 mW, (c) 60 mW, and (d) 80 mW. (e) Cross-sectional profiles of the fabricated microcavities with different laser powers. (f) Drilled depth as a function of laser power