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Related Experiment Video

Updated: Nov 8, 2025

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

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Published on: June 7, 2019

Polarization-Dependent All-Dielectric Metasurface for Single-Shot Quantitative Phase Imaging.

Einstom Engay^1,2, Dewang Huo^1,3, Radu Malureanu¹

¹DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, Kgs. Lyngby 2800, Denmark.

|April 22, 2021

Summary

This summary is machine-generated.

This study introduces a novel metasurface for faster phase retrieval, enabling label-free microscopy of dynamic objects. The technique uses a single polarization-dependent device to capture two images simultaneously, simplifying wavefront sensing.

Keywords:

all-dielectric metasurface quantitative phase imaging transport-of-intensity wavefront sensing

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Area of Science:

Optics and Photonics
Metamaterials
Microscopy

Background:

Phase retrieval is a key technique in quantitative phase imaging for optical metrology and label-free microscopy.
Traditional phase retrieval methods require multiple intensity measurements, limiting their use to static samples due to camera or sample translation.

Purpose of the Study:

To develop a faster and more versatile phase retrieval technique applicable to dynamic objects.
To leverage a single polarization-dependent metasurface for simultaneous image acquisition in phase calculation.

Main Methods:

Proposed a polarization-dependent all-dielectric metasurface to simultaneously record two images.
Utilized the two images for phase calculation based on the transport-of-intensity equation.
Demonstrated the technique for wavefront sensing of technical samples in a standard imaging setup.

Main Results:

The metasurface successfully splits orthogonal polarization components and introduces a phase shift.
Simultaneous recording of two images was achieved, enabling efficient phase calculation.
Proof-of-principle demonstration confirmed the technique's efficacy in wavefront sensing.

Conclusions:

The metasurface-based approach offers a fast and compact solution for phase retrieval.
This technique overcomes the limitations of traditional methods for dynamic object imaging.
The proposed configuration is readily integrable into commercial imaging systems.