超快演化光场的含时二阶关联特性研究

doi:10.3969/j.issn.1000-5641.2023.04.013

摘要/Abstract

摘要：

基于蒙特卡洛(Monte Carlo)算法, 模拟并分析了超快演化发光动力学过程中的光子探测事件; 研究了含时光子二阶关联函数的数值计算方法, 以及多种误差因素对光子二阶关联函数的影响. 结果表明, 同步时间抖动 (初始时刻漂移) 使得在初始时刻光强剧烈变化区域的含时二阶关联函数值显著偏大, 同时导致了时间积分的二阶关联函数在任意时间延迟下的值偏大. 背景光子计数的存在使得热态光的零延迟二阶关联函数值明显地趋近于1. 该研究为复杂光场的光子二阶关联函数的理论研究提供了一种简化模拟方法, 并为后续进行超高时间分辨的光子二阶关联实验测量提供了理论支持和数值分析方法.

关键词: 光子二阶关联函数, 时间动力学, 蒙特卡洛算法

Abstract:

Based on the Monte Carlo algorithm, photon detection during ultrafast evolutionary light emission was simulated and analyzed in this study. In addition, a method for calculating the time-resolved photon second-order correlation function was developed, and the effects of various errors on the photon second-order correlation function were investigated. The results show that the synchronous time jitter (initial time drift) significantly increases the time-resolved second-order correlation function when the light intensity sharply increases at the initial time, and the value of the time-integrated second-order correlation function is high at any delay. The existence of background photon counts causes the value of the zero-delay second-order correlation function of thermal light to approach unity. This study proposes a simplified simulation method for the theoretical study of photon second-order correlation functions in complicated light fields. Furthermore, this study provides theoretical support and numerical analysis methods for the subsequent experimental measurements of second-order correlation functions with ultrahigh time resolution.

Key words: photon second-order correlation function, time dynamics, Monte Carlo algorithm

中图分类号:

O431.2

王振宇, 谢微. 超快演化光场的含时二阶关联特性研究[J]. 华东师范大学学报（自然科学版）, 2023, 2023(4): 119-126.

Zhenyu WANG, Wei XIE. Time-resolved second-order correlation function of ultrafast evolutionary light field[J]. Journal of East China Normal University(Natural Science), 2023, 2023(4): 119-126.

图/表 4

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