Escalated deep-subwavelength acoustic imaging with field enhancement inside a metalens

• Main Authors: Chen, Jian, Sun, Zeqing, Rao, Jing, Lisevych, Danylo, Fan, Zheng
• Other Authors: School of Mechanical and Aerospace Engineering
• Format: Article
• Language: English
• Published: 2022
• Subjects: Engineering::Mechanical engineering; Superlens; Ultrasonography
• Online Access: https://hdl.handle.net/10356/154203
• Institution: Nanyang Technological University

Super-resolution acoustic imaging with state-of-the-art spatial resolution (lambda/50), with lambda being the wavelength, is showcased with a holey-structured metalens. However, the imaging mechanism under unity transmission based on Fabry-Perot resonances means the metalens fundamentally suffers fr...