“…This study may provide insight into the relationship between plasmonic nanobubbles and the triggered microbubbles. The ninth paper, authored by J. Wang, Z. Li, and W. Liu, rigorously analyzed and systematically designed a double-layer metal superlens to improve subwavelength imaging ability [ 9 ]. This work provided sound theoretical analysis and a systematic design approach to a double-layer metal superlens for nearfield subwavelength imaging, such as fluorescent micro/nanoscopy or plasmonic nanolithography.…”