Related Experiment Video
Updated: Jan 17, 2026
10:28
Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
Published on: July 5, 2016
10.7K
Dual-mode varifocal Moiré metalens for quantitative phase and edge-enhanced imaging
Yi Lian1,2, Yongqi Liu1,2, Dewen Cheng1,2
1State Key Laboratory of Chips and Systems for Advanced Light Field Display, School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China.
Nanophotonics (Berlin, Germany)
|September 19, 2025
Summary
A novel Moiré metalens enables compact quantitative phase imaging (QPI) and edge-enhanced imaging. This polarization-multiplexed device overcomes limitations of traditional transport-of-intensity equation (TIE) methods for faster, more accurate phase retrieval and imaging.
Area of Science:
- Optics and Photonics
- Materials Science
- Imaging Technology
Background:
- Quantitative phase imaging (QPI) using the transport-of-intensity equation (TIE) is vital for micrographic imaging and optical metrology.
- Existing TIE-based QPI systems face challenges with detector axial displacement, limiting speed, integration, and accuracy, especially for high-gradient phase imaging.
Purpose of the Study:
- To develop a compact, multifunctional metalens for advanced QPI and edge-enhanced imaging.
- To overcome the limitations of conventional TIE-based phase imaging systems.
Main Methods:
- A polarization-multiplexed Moiré metalens was designed and fabricated.
- The metalens was utilized for quantitative phase retrieval using the TIE method under x-polarized light.
- Varifocal edge-enhanced imaging was achieved using y-polarized light.
Main Results:
- The Moiré metalens achieved quantitative phase imaging with a Root Mean Square Error (RMSE) of 0.015 radians.
- Continuous zooming capability from 58.7 μm to 61.8 μm was demonstrated.
- Edge-enhanced imaging with a minimum spatial resolution of 1.3 μm was realized.
Conclusions:
- The proposed Moiré metalens offers a compact, integrated solution for high-precision, unwrapping phase imaging.
- This technology paves the way for advanced optical detection, microscopy, and biomedical imaging applications.
