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利用一对通过电感耦合的约瑟夫森结,设计了一种新型的毫米波探测器。探测器模拟了寄生蝇的听觉结构,可以放大两个约瑟夫森结接收到的毫米波之间的微弱相位延迟,进而精确分辨毫米波的方向。采用数值计算方法进行模拟,结果表明通过电感耦合的两个约瑟夫森结确实可以将微弱的相位延迟放大到可以观测的程度。当两个约瑟夫森结之间的距离为270μm,被测波波长为3mm时,定向误差可以被控制在0.1°以下。
Using a couple of Josephson junctions through inductive coupling, a novel millimeter-wave detector was designed. The detector simulates the auditory structure of the parasitic flies, amplifying the weak phase delay between millimeter waves received by two Josephson junctions, and thus accurately resolving the millimeter wave direction. Numerical simulations show that the two Josephson junctions coupled by inductive coupling can indeed amplify the weak phase delay to an observable level. When the distance between two Josephson junctions is 270 μm and the wavelength of the measured wave is 3 mm, the orientation error can be controlled below 0.1 °.