Publications by authors named "An-Ping Yu"
Article Synopsis
- - The creation of a sub-diffraction longitudinally polarized spot is crucial for advanced technologies like optical tweezers and super-resolution microscopy, focusing light beyond traditional limits.
- - A new experimental approach using a binary phase lens has been developed, which effectively focuses radially polarized light to achieve a focal spot size smaller than the diffraction limit.
- - The lens operates with a high numerical aperture of 0.93 and generates a focal spot with a size approximately 0.456 times the wavelength, along with a sub-diffraction optical needle.
The generation of a sub-diffraction optical hollow ring is of great interest in various applications, such as optical microscopy, optical tweezers, and nanolithography. Azimuthally polarized light is a good candidate for creating an optical hollow ring structure. Various of methods have been proposed theoretically for generation of sub-wavelength hollow ring by focusing azimuthally polarized light, but without experimental demonstrations, especially for sub-diffraction focusing.
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