Subwavelength acoustic imaging using kHz-GHz extraordinary transmission

我们已经展示了一种基于膜共振（MR）的基于超透射（ET）的扫描声学显微镜，其在音频（高达20 kHz）范围（波长~1-10 mm）中具有深亚波长（<lamba/30）分辨率。显微镜有一个直径约1厘米的塑料膜，工作频率约为1000 Hz。我们确认了高达15 mm距离的地形测量操作。线性扫描由几种材料制成，以确认λ/20分辨率。我们已经开发了一个新的分析模型，这个系统，并准备在期刊上发表的结果在目前的时间。我们也做了模拟的GHz的纵向波在纳米硅桥和确认的工作原理与槽在输入侧。我们计算出的传输效率最高可达250，这是一项世界纪录。一篇期刊论文已经写好，我们正在最后检查阶段，准备在2-3周内提交。

We have demonstrated an Extraordinary-Transmission (ET)-based scanning acoustic microscope based on membrane resonance (MR) in the audio (up to 20 kHz) range (wavelength ~1-10 mm) with deeply sub-wavelength (<lamba/30) resolution. The microscope has a plastic membrane of diameter around 1 cm working at around 1000 Hz. We confirmed operation for topography measurement up to 15 mm distance. Linear scans were made of several materials to confirm lambda/20 resolution. We have developed a new analytical model of this system and are preparing a journal publication of the results at the present time.We have also done simulations on GHz ET of longitudinal waves in nanoscale silicon bridges and confirmed the principle works with grooves at the input side. We have calculated the transmission efficiency to be a maximum of 250, a world record. A journal paper has been written and we are on the final check stage, ready for submission in around 2-3 weeks.