Using the recently discovered THORS phenomenon, it is possible to generate optically induced, local density barriers in air by the absorption of intense, modulated laser light (the THORS phenomenon), which results in abrupt differences in compressibility of the air at these barriers that can efficiently reflect incident acoustic waves. In this note, we demonstrate the ability to optically manipulate and reflect acoustic waves in air as well as optimize the functional parameters (optical modulation and acoustic frequency) and characterize the effects of common physical parameters, including localized thermal gradients and incident angle of reflection on the efficiency of the resulting acoustic reflection. Finally, the ability to efficiently steer acoustic waves around a physical obstruction using THORS is also demonstrated.

使用最近发现的 THORS 现象，可以通过吸收强烈的调制激光（THORS 现象）在空气中产生光学诱导的局部密度障碍，这会导致这些障碍处空气压缩率的突然差异，有效地反射入射声波。在本说明中，我们展示了光学操纵和反射空气中的声波以及优化功能参数（光调制和声频）的能力，并表征常见物理参数的影响，包括局部热梯度和入射角反射产生的声反射的效率。最后，还展示了使用 THORS 有效引导声波绕过物理障碍物的能力。