Sub-50 nm optical imaging in ambient air with 10× objective lens enabled by hyper-hemi-microsphere.

ABSTRACT: Optical microsphere nanoscope has great potential in the inspection of integrated circuit chips for semiconductor industry and morphological characterization in biology due to its superior resolving power and label-free characteristics. However, its resolution in ambient air is restricted by the magnification and numerical aperture (NA) of microsphere. High magnification objective lens is required to be coupled with microsphere for nano-imaging beyond the diffraction limit. To overcome these challenges, in this work, high refractive index hyper-hemi-microspheres with tunable magnification up to 10× are proposed and realized by accurately tailoring their thickness with focused ion beam (FIB) milling. The effective refractive index is put forward to guide the design of hyper-hemi-microsphere

SUBMITTER: Wu G 

PROVIDER: S-EPMC9974943 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature