文档介绍：学号08113119
密级
哈尔滨工程大学本科生毕业论文
激光诱导稀土纳米材料黑体辐射特性的实验研究
院系名称:理学院
专业名称:电子科学与技术
学生姓名:
指导教师:
2012年6月
摘要
激光诱导稀土离子掺杂纳米材料的黑体辐射现象近年来得到了人们的关注,但其所表现出来的非线性黑体辐射行为及其产生原因尚未得到深入研究和明确的解释。本文研究了稀土纳米材料的黑体辐射特性,观察到了微米尺度的辐射点源并分析了其非线性热辐射及双稳迟滞现象的物理机制。
本论文主要研究红外激光诱导稀土离子Tm,Yb掺杂氧化物纳晶的黑体辐射现象及其非线性双稳迟滞特性。在972 nm激光激发下,实验测量了Tm,Yb:ZrO2纳晶的黑体辐射谱,观察到了微米尺度的黑体辐射点源。讨论了激光诱导点源的黑体辐射特性,研究了黑体辐射温度随激光器激发功率的变化规律,并分析了稀土纳米材料产生强烈黑体辐射的原因。从理论上解释了黑体辐射双稳态是掺杂离子的无辐射跃迁量子效率及辐射跃迁量子效率随温度的非线性变化引起的。实验测量了Tm,Yb:ZrO2纳晶的黑体辐射双稳态特性曲线,并进一步分析了辐射双稳态特性和固液相变对双稳行为的影响。
关键词:黑体辐射;灰体辐射;双稳态;稀土纳米材料
Abstract
Laser induces nanomaterials doped rare earth ions to blackbody radiation phenomenon, and in recent years the phenomenon has raised concern by people, but the expression of nonlinear radiation behavior and their reasons bold has not been deep research and clear explanations. This paper studies the blackbody radiation characteristics of nanomaterials doped by rare earth, observes the micron scale radiation point source and analyzes its nonlinear thermal radiation and bistable hysteresis of physical mechanism.
This thesis mainly infrared laser induced the blackbody radiation phenomenon and non-linear bistable hysteresis characteristics of nanomaterials doped by rare earth. In the 972 nm laser inspire, the experiment measures the Tm,Yb: ZrO2 crystal radiation spectrum, and observed the blackbody radiation micro-metre scale point source. This thesis discusses the blackbody radiation characteristics of point source induced by the laser, the phenomenon of the radiation temperature bolded with laser stimulate the change rule of power, and analyzes the rare earth nanometer material produces strong radiation causes the bold. The theoretical explanation the blackbody radiation two steady state is doped ions no radiation warp quantum efficiency and radiation transition efficiency with temperature of quantum nonlinear change. The experiment measures characteristic curve of the blackbody-radiation bistability on the Tm, Yb: ZrO2 crystal, a