Quantum Imaging beyond the Diffraction Limit by Optical Centroid Measurements
Mankei Tsang
备注:
4 pages, 2 figures; v2: accepted by PRL, see also the accompanying Viewpoint commentary by Anisimov and Dowling [Physics 2, 52 (2009), http://physics.aps.org/articles/v2/52]
I propose a quantum imaging method that can beat the Rayleigh-Abbe diffraction limit and achieve de Broglie resolution without requiring a multiphoton absorber as the detector. Using the same non-classical states of light as those for quantum lithography, the proposed method requires only intensity measurements, followed by image post-processing, to produce the same complex image patterns as those in quantum lithography. The method is expected to be experimentally realizable using current technology.
Quantum spatial superresolution by optical centroid measurements
量子光刻(QL)已被建议作为一种手段,实现增强的空间分辨率的光学成像,但它的实现一直阻碍了低多光子探测率的记录材料。最近,提出了一种光学质心测量(OCM)方法,以获得与QL相同的空间分辨率增强,但具有更高的检测效率(M。Tsang,Phys. Rev. Lett. 102,253601,2009)。在这里,我们描述了一种变化的OCM方法,具有更高的检测效率的基础上使用的光子数分辨检测。我们还报告了双光子干涉的实验室结果。我们将这些结果与基于多光子探测的标准QL方法进行了比较,结果表明,新方法导致超分辨率,但具有更高的探测效率。
Laser-Induced Electron Diffraction: Inversion of Photoelectron Spectra for Molecular Orbital Imaging
本文讨论了利用激光诱导电子衍射(LIED)获得的线性分子的光电子能谱对分子轨道成像的可能性。这是我们最近在Physical Review A \textbf{94},023421(2016)上发表的工作的扩展,适用于二氧化碳分子的HOMO-1轨道。我们表明,这样的成像技术具有潜在的图像分子轨道在不同的核间距离在亚飞秒的时间尺度和分辨率的几分之一埃。