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Memory effect evaluation based on transmission matrix calculation

Memory effect evaluation based on transmission matrix calculation
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摘要 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 pattern, and the closer the adjacent focal points are, the wider the fringe pattern 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. 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 pattern, and the closer the adjacent focal points are, the wider the fringe pattern 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.
作者 Ming Li Long-Jie Fang Lin Pang 李明;方龙杰;庞霖(College of Physics, Sichuan University)
机构地区 College of Physics
出处 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第7期259-268,共10页 中国物理B(英文版)
基金 Project supported by the National Natural Science Foundation of China(Grant Nos.61675140 and 61377054) Graduate Student’s Research and Innovation Fund of Sichuan University,China(Grant No.2018YJSY005)
关键词 SCATTERING MEDIA phase MODULATION optical MEMORY effect FOCAL POINT scattering media phase modulation optical memory effect focal point
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