High quality organically modified microresonators for nonlinear photonics

Dr. Xiaoqin Shen

Mork Family Department of Chemical Engineering and Materials Science,

University of Southern California

地点: 物理楼中楼215会议室

时间：2017年12月29日（周五）下午2:30-4:00

摘要：Ultra-high quality factor (Q) whispering-gallery microresonators are an promising platform for studying nonlinear optical (NLO) processes. The ultra-high Q ensures high circulating optical intensities within the resonator, reducing the threshold power needed to generate nonlinear phenomenon. However, materials that are available for fabricating high Q microresonators are very limited, hindering the further exploration of microresonators for nonlinear optics. On the other hand, organic NLO molecules have received extensive attention because of their higher optical nonlinearities and structural versatility. However, due to fundamental incompatibilities with conventional nanofabrication methods, limited success has been realized in the development of a cavity-nonlinear optics using these materials. Driven by organic materials, my research interest is exploring NLO molecule-modified resonators for optics and nonlinear photonics applications. In this talk, I will present my recent effort on some proof-of-concept fundamental work on high Q organically modified microresonators and their latest advances. Particularly, the impact of organic materials on Kerr optical frequency comb and stimulated Rama in high Q resonators will be discussed. Some research perspectives will also be covered in the end.

报告人：沈晓钦，2008年硕士毕业于中国科学技术大学高分子系，从事光响应聚合物合成。2013年博士毕业于新加坡国立大学化学系（激光光谱与成像），利用超快激光光谱和成像技术研究多光子吸收聚合物及其应用。目前在南加州大学从事博士后研究。期间，提出有机分子杂化高品质微腔结合概念，从材料的角度制备及研究新型微腔的非光学线性性质及应用。作为研究项目设计人和撰写人，为课题组申请到多项美国研究基金资助，包括国家情报高等研究计划项目(IARPA)一项、美国陆军研究署项目(ARO)一项。另有美国国防高等研究计划项目(DARPA)和美国科学基金(NSF)若干项(在审)。目前，在微腔方向的部分研究结果，以第一作者兼通讯作者身份发表在Science Advances上。

联 系 人 肖云峰(62765512)