Study on optical nonlinearity and optical limiting property of porphyrin-oxygenated carbon nanomaterial blends

The goal of Optoelectronics Letters is to rapidly report original,new and important results in the fields of photonics and optoelec-tronics in English,to advance the international academic exchanges.Optoelectronics Letters pays a particularly attention to the cross topics between photonics and electronics.The scope of Optoelectronics Letters is as follows:Novel OEdevices and applications;New materials and functional components;Nano-structures and OE integration;Nano-quantum optoelectronics;Optoelectronic information technology;Sensing,measurement and inspection;Storage and display;Image and information processing;Biomedical photonics,etc.     

单层二硫化钨的荧光特性研究

单层二硫化钨的介电屏蔽效应弱,具有大的激子束缚能和强的荧光发射,是直接带隙 半导体。利用自制荧光显微光谱成像实验装置对单层二硫化钨进行了荧光性能的测试 和分析。结果表明,单层二硫化钨的荧光发射峰处于620 nm 附近。随着激光功率的 增大,单层二硫化钨的荧光强度增大,其荧光发射峰发生明显的红移,且荧光峰位红 移量和荧光强度受衬底类型调控。激子行为分析表明,中性激子和带电激子的峰值强 度比是衬底依赖的。