Fig. 3: Experiment results about chiral transmission of Rayleigh wave.
The mapping of normalized uy measured by laser Doppler vibrometer along the segment (x = −55–−25 cm and x = 25 – 55 cm every 1 cm) in time (a, b) and frequency (c, d) domain, and they present the amplitude of Rayleigh wave with negative or positive k, respectively. The elastic SAM of excited source is positive (a, c) and negative (b, d), respectively. The central frequency of input signal is fc = 28 kHz. e The rectified amplitude of the ∣uy∣ along x axis at 28 kHz, which all normalized to the ∣uy∣ recorded at point x = −55 cm with elastic spin-down source. The red and blue dots represent results with elastic spin-up and spin-down sources, respectively. f The average ratios of measured ∣uy∣ at x = −55–−25 cm and x = 25–55 cm, in a broad ultrasonic frequency regime. The red dots are for the ∣uy(x<0)/uy(x>0)∣ when using elastic spin-up source while the blue dots stands for ∣uy(x>0)/uy(x<0)∣ with the elastic spin-down source. The bars at each frequency are defined as the average ratio plus and/or subtract standard deviation of ratios derived at every group of points. The difference between two rectification ratio profiles comes from the imperfection of chiral sources during the manual installation.
