Li Dong, Yao Yao
Microsystems and Terahertz Research Center, China Academy of Engineering Physics, Chengdu, 610200, Sichuan, China.
Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang, 621999, Sichuan, China.
Sci Rep. 2021 Apr 8;11(1):7785. doi: 10.1038/s41598-021-85846-7.
The scheme of optical imaging using scattering lens can provide a resolution beyond the classical optical diffraction limit with a coherent-state input. Nevertheless, due to the shot noise of the coherent state, the corresponding signal-to-noise ratio and resolution are both still shot-noise-limited. In order to circumvent this problem, we theoretically propose an alternative scheme where the squeezed state (with a sub-shot noise) is considered as input and the quantum noise is then suppressed below the shot-noise level. Consequently, when comparing with the previous imaging scheme (using combination of coherent state and scattering lens), our proposal is able to achieve an enhanced signal-to-noise ratio for a given scattering lens. Meanwhile, it is demonstrated that the resolution is also improved. We believe that this method may afford a new way of using squeezed states and enable a higher performance than that of using coherent state and scattering lens.
使用散射透镜的光学成像方案在相干态输入下能够提供超越经典光学衍射极限的分辨率。然而，由于相干态的散粒噪声，相应的信噪比和分辨率仍然受散粒噪声限制。为了规避这个问题，我们从理论上提出了一种替代方案，即将压缩态（具有亚散粒噪声）作为输入，从而将量子噪声抑制到散粒噪声水平以下。因此，与先前的成像方案（使用相干态和散射透镜的组合）相比，我们的方案在给定散射透镜的情况下能够实现更高的信噪比。同时，结果表明分辨率也得到了提高。我们相信，这种方法可能提供一种使用压缩态的新途径，并能实现比使用相干态和散射透镜更高的性能。
