Surface nonlinear optics in Organic-modified micro-resonators

Ultra-high quality factor (Q) whispering-gallery mode (WGM) optical micro-resonators provide unprecedented capability to confine light in a volume smaller than a strand of human hair, dramatically enhancing light-mater interactions. They have been emerging are a promising platform for studying nonlinear optical (NLO) processes and other photonic phenomenon. These type of devices have shown a great promise for a variety of science and technologies, from communication to sensing and metrology. To date, materials available for high Q micro-resonators fabrication are limited to a few type of glasses and inorganic crystals that have low optical nonlinearities, hindering the further exploration of micro-resonators for nonlinear optics. Driven by the high NLO susceptibilities of 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 research work on NLO molecule-hybrid micro-resonators and their latest advances. In particular, I will discuss how the introduction of NLO molecules onto high Q micro-resonators could improves the device’s optical behaviors. Reference：Xiaoqin Shen*, R. Beltran, et al. Low threshold parametric oscillation in organically modified microcavities. Science Advances 4, eaao4507 (2018)J-h Chen*, Xiaoqin Shen*, et al. Microcavity nonlinear optics with an organically functionalized surface. Phys. Rev. Lett. 123, 173902 (2019)Xiaoqin Shen*, H. Choi, et al. Raman laser from an optical microcavity grafted with a single molecule layer. Nature Photonics DOI:10.1038/s41566-019-0563-7 (2019)