2024/02/13 by Liuxian Zhao, Xuxu Zhuang, Zhao, Liuxian +7
Earth and Planetary Sciences · Engineering · #06Bxx #Acoustic Wave Phenomena Research #Applied Physics (physics.app-ph) #B.1.1 #FOS: Physical sciences #Seismic Waves and Analysis #Underwater Acoustics Research
paper · pdf · doi:10.48550/arxiv.2402.10959
openalex publication_date 2024/02/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this paper, a novel structural Luneburg lens with local resonators is proposed. This lens allows for the realization of subwavelength focusing in low frequency range. The lens is achieved by graded refractive index from the lens centre to the outer surface. Numerical simulations are conducted to obtain data on wave propagation waveform, maximum displacement amplitude, and full width at half maximum of the lens's focal region. The results show that a broadband frequency range can be achieved for subwavelength focusing. This provides a straightforward and adaptable method for designing the structural Luneburg lens for numerous applications.