基于非线性反馈和混沌的亚波长位置传感
Subwavelength position sensing using nonlinear feedback and wave chaos
摘要:
我们展示了一种位置传感技术,依赖于混沌的固有灵敏度,在那里我们照亮了一个亚波长的对象与复杂的结构的射频场产生的波混沌和非线性反馈回路。我们在准周期状态下操作系统,并分析反馈回路中标量电压信号的频率内容的变化。这使我们能够以~λ/10,000的一维分辨率和~λ/300的二维分辨率提取物体的位置,其中λ是照明源的最短波长。
英文摘要:
We demonstrate a position-sensing technique that relies on the inherent sensitivity of chaos, where we illuminate a subwavelength object with a complex structured radio-frequency field generated using wave chaos and a nonlinear feedback loop. We operate the system in a quasi-periodic state and analyze changes in the frequency content of the scalar voltage signal in the feedback loop. This allows us to extract the object's position with a one-dimensional resolution of ~λ/10,000 and a two-dimensional resolution of ~λ/300, where λ is the shortest wavelength of the illuminating source.
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