摘要
纳米光源是片上集成光通信的关键元件,而偏振角度是相干光源的重要特性之一,了解偏振影响因素对元件制备至关重要。介绍了一种增益介质与微球腔分离的纳米光源结构,研究晶体结构对光源偏振的影响。利用微球的全对称性,排除微腔结构对偏振的选择特性;进一步通过改变单晶CdSe纳米带与泵浦光的相对角度,排除泵浦光的影响,并获得偏振极化比为1.7的激光辐射;从而证明微腔辐射偏振态由增益材料CdSe纳米带的晶向决定。研究结果加深了纳米材料对于微纳器件偏振特性作用机理的理解,同时为构造实用化微型激光器提供了理论途径。
Nanoscale light sources are key components for on-chip integrated optical communication.Since the polarization angle is one of the important characteristics of coherent light sources,understanding the influence of polarization is crucial for component preparation.In this paper,we present a nanoscale light source structure with separate gain medium and microsphere cavities to study the polarization effect of the crystal structure on the light source.By exploiting the full symmetry of the microspheres,the selective property of the microcavity structure on polarization is eliminated.Furthermore,by changing the relative angle of the single-crystal CdSe nanoribbons to the pump light,the influence of the pump light is eliminated and the laser radiation with a polarization ratio of 1.7 is obtained.Thus,it is shown that the polarized state of the microcavity radiation is determined by the crystallographic orientation of the CdSe nanoribbons of the gain material.The results deepen the understanding of the role of nanomaterials in the polarization characteristics of micro-nano devices and provide a theoretical route to the construction of practical micro-lasers.
作者
毕文瀚
于佳鑫
BI Wenhan;YU Jiaxin(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《光学仪器》
2025年第4期62-68,共7页
Optical Instruments
基金
国家自然科学基金(12074259)。
