Fig. 1. Structural sketch of LIU transducer based on CB-PDMS composite film

Fig. 2. Experimental setup for ultrasound generation and characterization of LIU transducer

Fig. 3. Experimental setup schematic for MAET based on LIU transducer

Fig. 4. (a) Ultrasound waveform (inset is profile of laser excitation) and (b) frequency spectra generated from LIU transducer

Fig. 5. (a) Ultrasound signal and (b) frequency spectrum generated from unimproved LIU transducer

Fig. 6. (a) Distribution of ultrasound pressure generated by composite film along axial direction; (b) relationship between laser induced ultrasound pressure and laser energy

Fig. 7. (a) Normalized peak ultrasound pressure and (b) profile of peak ultrasound pressure on lateral plane

Fig. 8. (a) Photo of gel phantom with different conductivities; (b) B-scan image of gel phantom measured by MAET using developed laser-induced ultrasound transducer; (c) individual MAET signal spectrum at x=4 cm generated by the simulation of LIU transducer; (d) MAET signal spectrum at x=4 cm generated by the stimulation of piezoelectric