本文主要研究内容
作者陈雪（2019）在《265nm深紫外激光器结构设计研究》一文中研究指出：深紫外波段的激光器在高密度光数据存储、医疗杀菌、激光显示和卫星通信等领域都有着十分广泛的应用。近几年来国内外的学者及研究机构都对深紫外波段的激光器有着强烈的探索兴趣。目前深紫外激光器选用的是三元化合物AlGaN材料,通过调控A1N和GaN组成的三元化合物AlGaN中的A1组分,可以覆盖深紫外波段(220nm～280nm)。本研究的目标是激射出265nm波段的激光器件结构,并在该结构的基础上对器件进行优化,以获得更好的激光输出特性。本论文的主要工作内容如下:介绍了激光器的国内外发展现状,指明该研究方向的意义。并详细探讨了激光器件的工作机制及工作物质—AlGaN材料性质。另外也介绍了对该激光器件进行电学及光学模拟运算所用到的物理方程及其调用的各种模型。本仿真研究的环境是基于CrossLight公司旗下的Lastip软件,所以对该软件的操作流程也做了简单的说明。本论文所设计激光器为功率型激光器,其目标激射波长265nm。先设计了最基本的双异质结构,有源区采用的是Al0.58GaN/Al0.68GaN的量子阱结构。但是此结构生成的光子能量沿器件的有源区分散,为了使输出能量集中,在该结构的P型包覆层上刻蚀脊结构。在该脊型量子阱结构的基础上,首先对有源区中量子阱结构进行了择优选择。通过仿真研究,当量子阱个数为2时对于此器件结构有最大的受激复合速率。但由于电子的迁移率高,电子会越过有源区,针对这种情况,在该器件结构上加入10nm厚的Al0.88GaN电子阻挡层可以有效的抑制电子泄漏。因为刻蚀脊结构相当于减小了空穴区域且本来空穴的迁移率就很低,所以针对P型波导层也分别作了组分和厚度的优化选择,确定了器件结构。得到器件的开启电压为4.5V,阈值电流为33mA,斜率效率为1.417W/A,电光转换效率为32.9%。但是由于AlGaN材料存在着很强的自发和压电极化效应,这种特性会影响器件的输出性能,为了更加接近实际生长出的器件性能,本文也对极化效应对激光器的输出性能做了探讨,考虑极化效应后,激光器的阈值电流升高了 7mA,电光转换效率降低了2.3%,降低了器件的输出性能。采用BN作为新型激光材料,将有源区设计为B0.39GaN/B0.45GaN的新型结构,得到激光器的阈值电流为27mA,斜率效率为1.219W/A,电光转换效率为26%。虽然此结构的光学性能有所下降,但提高了其电学性能,其阈值电流降低了6mA,改善了本研究的深紫外功率型激光器的电学性能,也为日后研究BGaN新型激光器提供了基础。
Abstract
shen zi wai bo duan de ji guang qi zai gao mi du guang shu ju cun chu 、yi liao sha jun 、ji guang xian shi he wei xing tong xin deng ling yu dou you zhao shi fen an fan de ying yong 。jin ji nian lai guo nei wai de xue zhe ji yan jiu ji gou dou dui shen zi wai bo duan de ji guang qi you zhao jiang lie de tan suo xing qu 。mu qian shen zi wai ji guang qi shua yong de shi san yuan hua ge wu AlGaNcai liao ,tong guo diao kong A1Nhe GaNzu cheng de san yuan hua ge wu AlGaNzhong de A1zu fen ,ke yi fu gai shen zi wai bo duan (220nm～280nm)。ben yan jiu de mu biao shi ji she chu 265nmbo duan de ji guang qi jian jie gou ,bing zai gai jie gou de ji chu shang dui qi jian jin hang you hua ,yi huo de geng hao de ji guang shu chu te xing 。ben lun wen de zhu yao gong zuo nei rong ru xia :jie shao le ji guang qi de guo nei wai fa zhan xian zhuang ,zhi ming gai yan jiu fang xiang de yi yi 。bing xiang xi tan tao le ji guang qi jian de gong zuo ji zhi ji gong zuo wu zhi —AlGaNcai liao xing zhi 。ling wai ye jie shao le dui gai ji guang qi jian jin hang dian xue ji guang xue mo ni yun suan suo yong dao de wu li fang cheng ji ji diao yong de ge chong mo xing 。ben fang zhen yan jiu de huan jing shi ji yu CrossLightgong si qi xia de Lastipruan jian ,suo yi dui gai ruan jian de cao zuo liu cheng ye zuo le jian chan de shui ming 。ben lun wen suo she ji ji guang qi wei gong lv xing ji guang qi ,ji mu biao ji she bo chang 265nm。xian she ji le zui ji ben de shuang yi zhi jie gou ,you yuan ou cai yong de shi Al0.58GaN/Al0.68GaNde liang zi jing jie gou 。dan shi ci jie gou sheng cheng de guang zi neng liang yan qi jian de you yuan ou fen san ,wei le shi shu chu neng liang ji zhong ,zai gai jie gou de Pxing bao fu ceng shang ke shi ji jie gou 。zai gai ji xing liang zi jing jie gou de ji chu shang ,shou xian dui you yuan ou zhong liang zi jing jie gou jin hang le ze you shua ze 。tong guo fang zhen yan jiu ,dang liang zi jing ge shu wei 2shi dui yu ci qi jian jie gou you zui da de shou ji fu ge su lv 。dan you yu dian zi de qian yi lv gao ,dian zi hui yue guo you yuan ou ,zhen dui zhe chong qing kuang ,zai gai qi jian jie gou shang jia ru 10nmhou de Al0.88GaNdian zi zu dang ceng ke yi you xiao de yi zhi dian zi xie lou 。yin wei ke shi ji jie gou xiang dang yu jian xiao le kong xue ou yu ju ben lai kong xue de qian yi lv jiu hen di ,suo yi zhen dui Pxing bo dao ceng ye fen bie zuo le zu fen he hou du de you hua shua ze ,que ding le qi jian jie gou 。de dao qi jian de kai qi dian ya wei 4.5V,yu zhi dian liu wei 33mA,xie lv xiao lv wei 1.417W/A,dian guang zhuai huan xiao lv wei 32.9%。dan shi you yu AlGaNcai liao cun zai zhao hen jiang de zi fa he ya dian ji hua xiao ying ,zhe chong te xing hui ying xiang qi jian de shu chu xing neng ,wei le geng jia jie jin shi ji sheng chang chu de qi jian xing neng ,ben wen ye dui ji hua xiao ying dui ji guang qi de shu chu xing neng zuo le tan tao ,kao lv ji hua xiao ying hou ,ji guang qi de yu zhi dian liu sheng gao le 7mA,dian guang zhuai huan xiao lv jiang di le 2.3%,jiang di le qi jian de shu chu xing neng 。cai yong BNzuo wei xin xing ji guang cai liao ,jiang you yuan ou she ji wei B0.39GaN/B0.45GaNde xin xing jie gou ,de dao ji guang qi de yu zhi dian liu wei 27mA,xie lv xiao lv wei 1.219W/A,dian guang zhuai huan xiao lv wei 26%。sui ran ci jie gou de guang xue xing neng you suo xia jiang ,dan di gao le ji dian xue xing neng ,ji yu zhi dian liu jiang di le 6mA,gai shan le ben yan jiu de shen zi wai gong lv xing ji guang qi de dian xue xing neng ,ye wei ri hou yan jiu BGaNxin xing ji guang qi di gong le ji chu 。
论文参考文献
论文详细介绍
论文作者分别是来自郑州大学的陈雪，发表于刊物郑州大学2019-07-03论文，是一篇关于深紫外激光论文,阈值电流论文,激光功率论文,材料论文,郑州大学2019-07-03论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自郑州大学2019-07-03论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：深紫外激光论文; 阈值电流论文; 激光功率论文; 材料论文; 郑州大学2019-07-03论文;