Spektor Boris, Normatov Alexander, Shamir Joseph
Department of Electrical Engineering, Technion--Israel Institute of Technology; Technion City, Haifa 32000, Israel.
Appl Opt. 2008 Feb 1;47(4):A78-87. doi: 10.1364/ao.47.000a78.
Optical singularities are localized regions in a light field where one or more of the field parameters, such as phase or polarization, become singular with associated zero intensity. Singular beam microscopy exploits the fact that the strong variations of the optical field around the singularities are highly sensitive to changes in their neighborhood. As a consequence, analysis of the light field scattered from the object during a scanning process can yield useful information about the object features. We present a theoretical background, numerical simulations, and experimental results. Preliminary experiments have demonstrated a sensitivity of 20 nm in the position and size of simple objects, with theoretically estimated 1 nm capability under the assumption of a reasonable and conservative 30 dB signal to noise ratio.
光学奇点是光场中的局部区域，在该区域中一个或多个场参数（如相位或偏振）会变为奇异值且强度为零。奇异光束显微镜利用了这样一个事实，即奇点周围光场的强烈变化对其邻域的变化高度敏感。因此，在扫描过程中对从物体散射的光场进行分析可以得出有关物体特征的有用信息。我们展示了理论背景、数值模拟和实验结果。初步实验已证明，对于简单物体，在位置和尺寸方面的灵敏度可达20纳米，在合理且保守的30分贝信噪比假设下，理论估计能力为1纳米。
