Ananda Das presented his work on "Direct measurements of optical nonlinearity in indium tin oxide nanoparticles" and Kyuyoung Bae presented his work on "High quality factor, nonlinear indium tin oxide nanoparticle-coated silica microsphere" at the OSA Topical Meeting on Nonlinear Optics in Waikoloa Beach, Hawaii.

Also, Won Park gave invited talks at the 10th International Conference on Metamaterials, Photonic Crystals and Plasmonics in Lisbon, Portugal, and also at the Optics and Photonics Congress 2019, Busan, Korea.

And Chenchen Mao's paper entitled "Enhanced Upconversion Luminescence by Two-Dimensional Photonic Crystal Structure" is published in ACS Photonics.