Wang Fang, Chen Ya-Ke, Li Chuan-Qiang, Ma Tao, Lu Ying-Hui, Liu Heng, Jin Chan. Porous silicon - calcium fluoride plasma waveguide with asymmetric Ag film and its sensitivity characteristicsJ. Acta Physica Sinica, 2021, 70(22): 224201. DOI: 10.7498/aps.70.20210704