论文标题
使用像素串扰建模的准确全息光电位
Accurate holographic light potentials using pixel crosstalk modelling
论文作者
论文摘要
事实证明，任意光电位在许多量子信息和用超低原子进行量子模拟实验中是有价值且通用的工具。使用相位调节的空间照明调制器（SLM），我们以$ 15 \％-40 \％$的效率和低于$ 2 \％$ $ $ $ root-mean-mean-squared误差的准确性在$ 15 \％-40 \％$之间产生任意光电位。高精度的关键是SLM的像素串扰在子像素尺度上的建模，这尤其与较大的光电位相关。我们采用共轭梯度最小化来计算给定目标光电位的SLM相模式，以测量SLM处的强度和波浪。此外，我们使用摄像头反馈来减少实验误差，消除光学涡旋，并研究角光谱法与傅立叶变换之间的差异以模拟光的传播。与以前的研究相比，使用所有这些技术的组合，我们实现了更准确和有效的光电位，并产生了一系列与冷原子实验相关的电位。
Arbitrary light potentials have proven to be a valuable and versatile tool in many quantum information and quantum simulation experiments with ultracold atoms. Using a phase-modulating spatial light modulator (SLM), we generate arbitrary light potentials holographically with measured efficiencies between $15\% - 40\% $ and an accuracy of below $2\% $ root-mean-squared error. Key to the high accuracy is the modelling of pixel crosstalk of the SLM on a sub-pixel scale which is relevant especially for large light potentials. We employ conjugate gradient minimisation to calculate the SLM phase pattern for a given target light potential after measuring the intensity and wavefront at the SLM. Further, we use camera feedback to reduce experimental errors, we remove optical vortices and investigate the difference between the angular spectrum method and the Fourier transform to simulate the propagation of light. Using a combination of all these techniques, we achieved more accurate and efficient light potentials compared to previous studies, and generated a series of potentials relevant for cold atom experiments.
