Subdiffraction-limited imaging based on longitudinal modes in a spatially dispersive slab

Article

关键词: NONLOCAL OPTICS;    PLASMONS;   

DOI  :  10.1103/PhysRevB.90.075107

来源: SCIE

【 摘 要 】

It was proposed that a flat silver layer could be used to form a subdiffraction-limited image when illuminated near its surface plasmon resonance frequency [J. B. Pendry, Phys. Rev. Lett. 85, 3966 (2000)]. In this paper, we study the possibility of obtaining sub diffraction resolution using a different mechanism, with no surface plasmons involved. Instead, by taking into account the nonlocal response of a thin silver slab, we show that longitudinal modes contribute to the formation of a subdiffraction-limited image in a frequency regime above the plasma frequency. The differences between these two distinct mechanisms are studied and explained.

【 授权许可】

Free