A graphene-based weak sound wave detector
A sonic detector and graphene technology, applied in the direction of measuring ultrasonic/sonic/infrasonic waves, instruments, measuring devices, etc., can solve the problems of single control mode of sonic detector and unfavorable detection of sonic waves
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[0031] In order to overcome the problem that the existing sound wave detector has a single control mode, which is not conducive to detecting sound waves in a wide frequency range. The present invention provides a figure 1 The shown graphene-based weak sound wave detector includes a substrate layer 1, which mainly plays a supporting role. The substrate layer 1 can be made of silicon dioxide, quartz, glass, etc., and the top layer of the substrate layer 1 A piezoelectric material layer 2 is provided, an insulating layer 3 is arranged above the piezoelectric material layer 2, and a graphene layer 4 is arranged above the insulating layer 3; the insulating layer 3 isolates the detection voltage loaded by the graphene layer 4 The gate control voltage loaded with the piezoelectric material layer 2 avoids the interaction between the two; the piezoelectric material layer 2 can receive the vibration of the sound wave, thereby forming an electric field inside the piezoelectric material l...
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