Fig. 1: Reconfigurable dynamic acoustic holography realised with a programmable semi-crystalline polymer film and a partitioned piezoelectric transducer (PZT). | Nature Communications

Fig. 1: Reconfigurable dynamic acoustic holography realised with a programmable semi-crystalline polymer film and a partitioned piezoelectric transducer (PZT).

From: Reconfigurable dynamic acoustic holography with acoustically transparent and programmable metamaterial

Fig. 1

At Step 1, target dynamic acoustic holography is optimised to simultaneously control the partitioned PZT and polymer. The semi-crystalline polymer film is laser rewritten for acoustic phase modulation, and the partitioned PZT is electrically programmed for acoustic fields multiplexing. When the semi-crystalline polymer film is projected with a laser beam in (i.), it shows that the phase profile ϕ of the transmission acoustic wave is changing from 0 to π. Further, the laser programmed polymer film is gradually recovering to its crystalline state in (ii.) and (iii.). Following the same procedure, the semi-crystalline polymer, together with the partitioned PZT, can be reprogramed (Step 2) to yield different scenarios of dynamic acoustic holography (Step 3).

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