“…During that period, investigations regarding the propagation of SSBW on shallow corrugation surfaces were widely conducted (Auld, Gagnepain, 1976;Auld, Yeh, 1979), establishing the fundaments of STW. Later on, the investigations on the differences between STW and Rayleigh wave (Auld et al, 1982), the propagation characteristics of STW under period and non-period structures (Baghai-Wadji et al, 1988;Danicki, 1983;Ronnekleiv, 1986;Thompson, Auld, 1986), and the development and fabrication of STW-based resonators (Auld, Thompson, 1987;Bagwell, Bray, 1987;Flory, Baer, 1987;Strashilov et al, 1997) have been carried out as well. Recently, related micro-strain sensors (Fu et al, 2016), torque sensors (Ji et al, 2016), vapor sensors (Stahl et al, 2018) and resonators (Doberstein, Veremeev, 2019) have been reported.…”