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飞秒激光诱导0.3~2.0 μm气溶胶的生成

Femtosecond Laser-Induced 0.3-2.0 μm Aerosol Formation

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摘要

在室温条件下的小型云室中, 研究了不同参数对飞秒激光诱导较大尺寸气溶胶生成的影响。实验结果表明, 在亚饱和条件下, 随着环境相对湿度的提高, 不同尺寸气溶胶的数密度增大, 尺寸分布以0.3~0.5 μm为主; 当环境相对湿度达到近饱和条件时, 较大尺寸(直径D≥0.7 μm)气溶胶的数密度显著增大, 1.0~2.0 μm气溶胶与0.3~0.5 μm气溶胶的数密度可相比拟。此时, 通过延长激光照射时间或者缩紧激光聚焦条件, 不同尺寸气溶胶的数密度可同等程度地增大, 尺寸分布规律基本不变。理论分析结果表明, 环境相对湿度条件是制约飞秒激光诱导较大尺寸气溶胶生成的关键因素。

Abstract

Under room temperature, the influences of different parameters on the formation of femtosecond laser-induced aerosols with relatively large size in a small cloud chamber are studied. The experimental results show that, under sub-saturated condition, the aerosol number density increases with the increase of relative humidity, and 0.3-0.5 μm aerosols are dominated. However, when the environmental relative humidity is near to be saturated, the number density of relative large-size aerosols (with their diameter D≥0.7 μm) is enhanced mostly, and at the end, the number density of 1.0-2.0 μm aerosols is comparable with that of 0.3-0.5 μm aerosols. When the laser irradiation duration and tightened focusing condition are prolonged under this near saturated condition, the number density of different size aerosols increases simultaneously at the same degree, and ultimately the corresponding size distribution does not change too much. Theoretical analysis results show that environmental relative humidity plays a key role for femtosecond laser-induced relative large-size aerosol formation.

Newport宣传-MKS新实验室计划
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中图分类号:TN249

DOI:10.3788/cjl201946.0308001

所属栏目:非线性光学

基金项目:国家重点基础研究发展计划(2011CB808100)、国家自然科学基金(11425418, 61475167)、中国科学院战略性科技先导专项(B类)(XDB160104)

收稿日期:2018-10-26

修改稿日期:2018-11-08

网络出版日期:2018-11-19

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胡兴凯:中国科学院上海光学精密机械研究所强场激光物理国家重点实验室, 上海 201800中国科学院大学, 北京 100049
鞠晶晶:中国科学院上海光学精密机械研究所强场激光物理国家重点实验室, 上海 201800
李儒新:中国科学院上海光学精密机械研究所强场激光物理国家重点实验室, 上海 201800
孙海轶:中国科学院上海光学精密机械研究所强场激光物理国家重点实验室, 上海 201800
刘永宏:中国科学院上海光学精密机械研究所强场激光物理国家重点实验室, 上海 201800
王成:中国科学院上海光学精密机械研究所强场激光物理国家重点实验室, 上海 201800
邓兆泽:中国科学院大气物理研究所中层大气和全球环境探测重点开放实验室, 北京 100029
冉靓:中国科学院大气物理研究所中层大气和全球环境探测重点开放实验室, 北京 100029
刘建胜:中国科学院上海光学精密机械研究所强场激光物理国家重点实验室, 上海 201800上海交通大学聚变科学与应用协同创新中心, 上海 200240上海师范大学物理系, 上海 200234
陈瑞良:拉瓦尔大学光学、光子学和激光研究中心, 加拿大 魁北克市 G1V 0A6
徐至展:中国科学院上海光学精密机械研究所强场激光物理国家重点实验室, 上海 201800

联系人作者:鞠晶晶(jenny06@siom.ac.cn); 邓兆泽(dengzz@mail.iap.ac.cn);

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引用该论文

Hu Xingkai,Ju Jingjing,Li Ruxin,Sun Haiyi,Liu Yonghong,Wang Cheng,Deng Zhaoze,Ran Liang,Liu Jiansheng,Chin See Leang,Xu Zhizhan. Femtosecond Laser-Induced 0.3-2.0 μm Aerosol Formation[J]. Chinese Journal of Lasers, 2019, 46(3): 0308001

胡兴凯,鞠晶晶,李儒新,孙海轶,刘永宏,王成,邓兆泽,冉靓,刘建胜,陈瑞良,徐至展. 飞秒激光诱导0.3~2.0 μm气溶胶的生成[J]. 中国激光, 2019, 46(3): 0308001

被引情况

【1】鞠晶晶,刘建胜,孙海轶,李儒新,See Leang Chin,徐至展. 飞秒激光人工影响天气的物理机理及研究进展. 中国激光, 2019, 46(5): 508004--1

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