Analysis of deep sub-micron resolution in microsphere based imaging

作者：Sundaram Vijay M; Wen Sy Bor^*

来源：Applied Physics Letters, 2014, 105(20): 204102.

DOI：10.1063/1.4902247

Based on full wave simulations, similar to 0.3 lambda and similar to 0.24 lambda imaging resolutions can be achieved for incoherent transverse and longitudinal point dipoles, respectively, when the dipoles are on an aluminum oxide base with a fused silica microsphere as the imaging lens. These high spatial resolutions (better than 0.5 lambda) can be attributed to almost 90 degrees light acceptance angle of the microsphere and the solid immersion effects from the microsphere/base material. These simulation results can explain the greater than or similar to 0.3 lambda and greater than or similar to 0.24 lambda minimum resolvable center to center separation distance for thin metallic nanostructures and elongated metallic nanostructures, respectively, which is equal to greater than or similar to 0.1-0.14 lambda edge to edge distance observed in previous microsphere imaging experiments.

• 出版日期2014-11-17