Organic-inorganic hybrid semiconductor nano-crystals towards submicroscopic region photonics

面向亚微观区域光子学的有机-无机杂化半导体纳米晶体

基本信息

批准号：
15310070
负责人：
TANI Toshiro
金额：
$ 10.18万
依托单位：
National University Corporation Tokyo University of Agriculture and Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

项目摘要

This report describes recent results of our basic research and development towards micro-photonics based on some specific quantum nano-structural photonic systems under the support of Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports and Culture (Category No.15310070).We improved our custom-made scanning laser microscope for imaging and spectroscopic measurements at low temperatures. High performance of the original microscope enables us to utilize it for sensitive detections of photoluminescence from single quantum dots. The microscope is versatile for various kinds of objective lenses from solid immersion lens (SIL), aspherical lens commonly used in HDD memory system to the specifically-designed low-temperature objective. Laser scanning mechanism located outside the optical cryostat enables us to achieve large scanning ranges independent of sample temperatures.Performance is demonstrated on single quantum dots detection based on CdSe/ZnS/TOPO organic-inorganic hybrid semiconductor nanocrystals prepared with a colloidal method. We have improved preparation protocols of capped CdSe and ZnS overcoated CdSe nanocrystals hugely, and quantum efficiency of photo-emission is now as high as 80% even at room temperature. The properties of quasi-0D Wannier exciton should be notable and have been investigated in details as well as their surface effects. Molecular J-aggregates by halogenated pseudoisocyanine in poly(vinylsulfate) thin films are also used for the comparison, in which quasi-1D Frenkel exciton is most notable. We have observed local reflection spectra of the J-aggregates fibril-shape structures provided in thin PVS polymer films and obtained supreme results. Present status of the investigations will be introduced.

本报告描述了我们基于一些特定的量子纳米结构光子系统的基础研究和发展的最新结果，该结果是在授予IN-AID的支持下，来自教育，科学，体育和文化部的科学研究（15310070类）。原始显微镜的高性能使我们能够利用它来对单量子点的光致发光敏感检测。显微镜对于来自固体浸入透镜（SIL）的各种客观镜片的多功能性，在HDD存储系统中常用于专门设计的低温物镜的非球形镜头。位于光学低温恒温器外部的激光扫描机制使我们能够实现与样品温度无关的大扫描范围。在基于CDSE/ZNS/TOPO Organic-Inorganic Hybrid Hybrid hybrid amiconconductor纳米晶体纳米晶体纳米晶体的单个量子点检测中，绩效证明了绩效。我们已经改善了限制的CDSE和Zns涂层CDSE纳米晶体的准备方案，即使在室温下，光发射的量子效率也高达80％。准0d Wannier激子的性能应值得注意，并在细节及其表面效应中进行了研究。在聚（乙烯基硫酸盐）薄膜中，通过卤代假偶然氰氨酸的分子J聚集也用于比较，其中Quasi-1d Frenkel Ickiton最明显。我们已经观察到薄PVS聚合物膜中提供的J-聚集纤维形状结构的局部反射光谱，并获得了最高结果。将引入调查的现状。