Y. Kawaguchi, M. Li, K. Chen, V. Menon, A. Alù, and A. B. Khanikaev, “Optical Isolator Based on Chiral Light-Matter Interactions in a Ring Resonator Integrating a Dichroic Magneto-Optical Material,” Applied Physics Letters, Special Topic Collection on Metastructures: From Physics to Application, Vol. 118, No. 24, 241104 (2021) (invited paper).