목록 Linear frequency conversion via sudden merging of resonances in time-variant terahertz metasurfaces Author Kanghee Lee, Jaehyeon Son, Byungsoo Kang, Jagang Park, Fabian Rotermund, Bumki Min Journal 2017 42nd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) Year 2009~2019