表面等离子体增强的钙钛矿微型激光器的研究

发布时间：2018-04-13 20:59

  本文选题：表面等离子体 + 低阈值　； 参考：《哈尔滨工业大学》2017年硕士论文

【摘要】：随着信息化进程的不断深入,大容量数据通信成为主流,高效的激光器在光纤通信,光电集成电路中应用愈加广泛。有机—无机杂化卤化铅钙钛矿激光器被证明是已知的最高效的激光器,其制备原料为甲基铵铅卤化物钙钛矿(CH_3NH_3PbX_3),具有成本低、工艺简单和效率高等优点。近年来,关于钙钛矿激光器的研究较多,但如何提高其光学性能以及降低激光损耗一直难以得到解决。利用金属纳米粒子的局域等离子激元共振的场增强原理可以有效的提高钙钛矿激光器的光学性能,并且制备简易,增强效果明显。这种表面等离子体增强的钙钛矿激光器在光电子学等领域有着重要的应用价值和发展前景。本文提出了利用纳米金颗粒的局域表面等离子体的共振吸收增强作用,以解决激光器的损耗问题;并在此基础上选择溴化铅钙钛矿作为增益介质,研究了纳米金颗粒对激光器性能影响。主要研究内容如下:理论分析金纳米颗粒的局域表面等离子体增强特性。通过理论计算说明了局域共振等离子激元增强是由两个因素引起:颗粒内部的偶极场以及外加电场作用。基于金纳米颗粒的钙钛矿激光器实验样品的制备。制备出了粒径均一的纳米金颗粒,研究了不同尺寸纳米金颗粒的光学性能,探索了自组装成纳米金单膜的方法,确定了在2 h的自组装条件下,平均粒径为43 nm的金颗粒自组装最佳,从而匹配增益介质。同时也制备了发光性能较好的溴化铅钙钛矿薄膜和钙钛矿单晶。基于金纳米颗粒的钙钛矿微型激光器的制备和性能测试。按照模型分别制备出了基于金纳米颗粒的棒状和片状钙钛矿微型激光器。在不同泵浦能量下测试了同一样品的同一位置的发光强度以及阈值曲线,将其与棒状和片状钙钛矿本身作对照,实现了较钙钛矿本身2倍以上的输出强度,同时实现了阈值10%的降低,即降低了纳米激光器的损耗,提高了其发光效率。基于纳米金/钙钛矿薄膜随机激光器的制备和性能测试。将纳米金颗粒与钙钛矿薄膜溶液按特定方式均匀混合,制备出了纳米金/钙钛矿薄膜随机激光器。研究发现钙钛矿的荧光受到金纳米颗粒结构的等离激元散射作用被波导反馈,使等离激元散射作用在“光学反馈腔”的协同作用下远超过其吸收作用,从而实现低阈值激光输出。
[Abstract]:With the development of information technology, large capacity data communication has become the mainstream. Efficient lasers are widely used in optical fiber communication and optoelectronic integrated circuits.The organic-inorganic hybrid lead halide perovskite laser has been proved to be the most efficient laser known. Its raw material is Ch _ 3NH _ 3NH _ 3PbX _ 3T _ 3s, which has the advantages of low cost, simple process and high efficiency.In recent years, much research has been done on perovskite lasers, but it is difficult to improve their optical properties and reduce laser losses.The field enhancement principle of local plasmon resonance of metal nanoparticles can effectively improve the optical properties of perovskite lasers.This kind of surface plasma-enhanced perovskite laser has important application value and development prospect in optoelectronics and other fields.In this paper, the resonant absorption enhancement of local surface plasmas of gold nanoparticles is proposed to solve the problem of laser loss, and on this basis, lead perovskite bromide is selected as gain medium.The effect of nanocrystalline gold particles on the laser performance was investigated.The main research contents are as follows: the local surface plasma enhancement characteristics of gold nanoparticles are analyzed theoretically.The theoretical calculation shows that the enhancement of local resonance plasmon is caused by two factors: the dipole field inside the particle and the external electric field.Preparation of experimental samples of perovskite laser based on gold nanoparticles.Nanocrystalline gold particles with uniform particle size were prepared. The optical properties of gold nanoparticles of different sizes were studied. The method of self-assembling into nanocrystalline gold monolayers was explored, and the self-assembly conditions for 2 h were determined.The gold particle with an average diameter of 43 nm is the best for self-assembly, which matches the gain medium.At the same time, lead bromide perovskite thin films and perovskite single crystals with good luminescence properties were also prepared.Preparation and performance test of perovskite micro laser based on gold nanoparticles.The rod-like and flake perovskite microlasers based on gold nanoparticles were fabricated according to the model.The luminescence intensity and threshold curve of the same sample at the same position were measured at different pump energies. Compared with the rod-like and flaky perovskite, the output intensity of the perovskite is more than 2 times that of the perovskite itself.At the same time, the threshold value is reduced by 10%, that is, the loss of nanocrystalline laser is reduced and the luminescence efficiency is improved.Based on the preparation and performance test of nanocrystalline gold / perovskite thin film random laser.A nanocrystalline gold / perovskite thin film random laser was prepared by mixing gold nanoparticles with perovskite film solution in a specific way.It is found that the fluorescence of perovskite is fed back by waveguide due to the scattering effect of gold nanoparticles, which makes the scattering action of isoexcitons far exceed its absorption under the synergistic action of "optical feedback cavity".Thus the low threshold laser output is realized.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN248

【相似文献】

中国期刊全文数据库 前10条

1 魏红;徐红星;;表面等离子体光子学研究的新进展[J];科学通报;2008年18期

2 张兵心;陈淑芬;付雷;邹正峰;孟彦彬;;基于表面等离子体激发的光学操控技术[J];中国激光;2012年06期

3 陈靖;陆文强;孙骞;;表面等离子体环形共振器的滤波性质[J];物理实验;2012年07期

4 王瑜;电致表面等离子体振子的色选吸收[J];现代显示;1997年01期

5 夏松;杨冬晓;;双层金属环形阵列的太赫兹表面等离子体研究[J];激光与红外;2014年08期

6 杨华,唐永新,吴念乐,郭继华,李师群;一种新的调Q方法-表面等离子体波调Q[J];量子电子学报;1999年06期

7 王向贤;叶松;余建立;许雪艳;许明坤;;表面等离子体干涉光刻理论计算(英文)[J];浙江大学学报(理学版);2012年02期

8 黄洪;赵青;焦蛟;梁高峰;黄小平;;深亚波长约束的表面等离子体纳米激光器研究[J];物理学报;2013年13期

9 刘亚青;张玉萍;张会云;吕欢欢;李彤彤;任广军;;光抽运多层石墨烯太赫兹表面等离子体增益特性的研究[J];物理学报;2014年07期

10 陈全胜;佟玉莹;庄园;蒋晓月;顾磊;王继成;王跃科;;基于金属狭缝-凹槽结构单向激发表面等离子体[J];中国激光;2014年05期

中国重要会议论文全文数据库 前10条

1 明海;王沛;鲁拥华;;金属复合微纳结构的表面等离子体的全光调控和传感的研究[A];2008介观光学及其应用研讨会论文集[C];2008年

2 曹烁晖;蔡伟鹏;谢堂堂;刘倩;刘晓庆;李耀群;;基于表面等离子体耦合定向荧光的生物传感研究[A];中国化学会第27届学术年会第09分会场摘要集[C];2010年

3 李海波;徐抒平;谷sソ，

本文编号：1746170