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Two-dimensional Fibonacci grating for far-field super-resolution imaging.

Kedi Wu1, Guo Ping Wang1

  • 1College of Electronic Science and Technology and Guangdong Provincial Key Laboratory of Optoelectronic Micro/Nano Optomechatronics Engineering, Shenzhen University, Shenzhen 518060, China.

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|December 10, 2016
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Summary
This summary is machine-generated.

A novel 2D Fibonacci grating enables super-resolution imaging by converting evanescent waves to propagating waves. This technique achieves beyond λ/7 resolution, outperforming incoherent illumination for detailed imaging.

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Area of Science:

  • Optics and Photonics
  • Super-resolution Imaging
  • Wave Phenomena

Background:

  • Evanescent waves are crucial for high-resolution imaging but decay rapidly.
  • Transforming evanescent waves into propagating waves is key to far-field super-resolution.

Purpose of the Study:

  • To introduce a two-dimensional (2D) Fibonacci grating for evanescent wave transformation.
  • To achieve far-field super-resolution imaging beyond the diffraction limit.
  • To compare imaging performance under coherent and incoherent illumination.

Main Methods:

  • Utilizing a 2D Fibonacci grating to convert evanescent waves to propagating waves.
  • Detecting far-field light field intensity distributions in free space.
  • Employing analytical calculations and numerical simulations for verification.

Main Results:

  • Demonstrated super-resolution imaging with spatial resolution beyond λ/7.
  • Showcased the ability to retrieve object images from far-field intensity data.
  • Identified superior resolution under coherent illumination compared to incoherent illumination.

Conclusions:

  • The 2D Fibonacci grating is an effective tool for far-field super-resolution imaging.
  • The proposed method offers a pathway to overcome traditional resolution limits.
  • Coherent illumination enhances the resolution capabilities of this grating-assisted system.