Toward the subdiffraction focusing limit of optical superresolution
VP Kalosha, I Golub - Optics letters, 2007 - opg.optica.org
Optics letters, 2007•opg.optica.org
A superresolving three-zone plate is applied to a Fresnel diffractive lens. It is shown that for
radial incident polarization this combination produces a focal spot approaching
superresolution allowed subdiffractive limit of 0.36 λ/NA for focusing. For media responsive
to longitudinal field component only, our phase engineering scheme results in a focal spot
size of 0.368 λ/NA. When used with a solid immersion lens, the scheme can generate the
smallest focal spot available for passive optics.
radial incident polarization this combination produces a focal spot approaching
superresolution allowed subdiffractive limit of 0.36 λ/NA for focusing. For media responsive
to longitudinal field component only, our phase engineering scheme results in a focal spot
size of 0.368 λ/NA. When used with a solid immersion lens, the scheme can generate the
smallest focal spot available for passive optics.
A superresolving three-zone plate is applied to a Fresnel diffractive lens. It is shown that for radial incident polarization this combination produces a focal spot approaching superresolution allowed subdiffractive limit of 0.36λ/NA for focusing. For media responsive to longitudinal field component only, our phase engineering scheme results in a focal spot size of 0.368λ/NA. When used with a solid immersion lens, the scheme can generate the smallest focal spot available for passive optics.
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