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Updated: May 29, 2026
10:01
Demonstration of a Hyperlens-integrated Microscope and Super-resolution Imaging
Published on: September 8, 2017
Realization of a subwavelength focused spot without a longitudinal field component in a solid immersion lens-based
1Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei, Anhui, China. huang918@mail.ustc.edu.cn
Optics Letters
|September 21, 2011
Summary
Azimuthally polarized beams with helical phase (APH) enable subwavelength focusing in solid immersion lenses (SILs), even with an air gap. This advanced illumination technique enhances focusing capabilities for applications in microscopy and lithography.
Area of Science:
- Optics and Photonics
- Nanotechnology
Background:
- Solid immersion lenses (SILs) are crucial for high-resolution optical systems.
- Achieving subwavelength focusing through an air gap in SIL systems is challenging with conventional polarized beams.
Purpose of the Study:
- To theoretically investigate the subwavelength focusing capabilities of a solid immersion lens (SIL) system illuminated by an azimuthally polarized beam with helical phase (APH).
- To demonstrate the simultaneous focusing in both the SIL and the third medium, overcoming the air gap challenge.
Main Methods:
- Theoretical prediction and analysis of optical field distribution in a multilayered medium.
- Simulation of light propagation and focusing using APH illumination compared to linear, circular, and radial polarization.
Main Results:
- APH illumination enables simultaneous subwavelength focusing in both the SIL and the third medium, overcoming the air gap issue.
- The focal field under APH illumination lacks a longitudinal component, with nonzero on-axis intensity.
- This method significantly enhances the SIL's capacity for creating supersmall focused spots.
Conclusions:
- APH illumination offers a superior method for achieving subwavelength focusing in SIL systems, particularly in the presence of an air gap.
- The unique properties of APH illumination extend the applicability of SILs to advanced optical technologies.
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