,Memory effect evaluation based on transmission matrix calculation

• 作 者: Ming Li Long-Jie Fang Lin Pang
• 机 构: College of Physics, Sichuan University, Chengdu 610065, China
• 出 处: 中国物理B（英文版）
• 发表日期: 2019年7期
• 关键词: scattering media phase modulation optical memory effect focal point

The memory effect is a type of auto correlation observed in linear systems, which is widely used to control scattered light through thin scattering layers. We show that there exists a strong correlation among the optimized phase distributions of adjacent focal points in focusing through scattering media. The numeric simulation and experiment indicate that within the memory effect, the phase difference between the two adjacent focal points shows an optical phase fringe patte, and the closer the adjacent focal points are, the wider the fringe patte will be, corresponding to the tilting of a plane wave phase added onto the acquired optical phase distribution at the focal point. This effect can be utilized for achieving optimal phase distributions of focal point scanning without optical phase evaluation via the experiment, which has great potential application in imaging through the scattering medium.