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Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution

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Metasurface-Enabled On-Chip Three-Dimensional Optical Manipulation.

Jingyao Zhang¹, Chao Feng¹, Tao He^1,2,3

¹MOE Key Laboratory of Advanced Micro-Structured Materials, Shanghai Frontiers Science Center of Digital Optics, Institute of Precision Optical Engineering, and School of Physics Science and Engineering, Tongji University, Shanghai 200092, China.

|April 9, 2026

Summary

This summary is machine-generated.

Researchers developed a new 3D optical manipulation platform using multifunctional metasurfaces. This technology enables dynamic, on-chip control of particles with high precision, advancing applications in biosensing and atom cooling.

Keywords:

metasurface on-chip optical manipulation optical tweezer particle manipulation photonic spin Hall effect spatial multiplexing

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Area of Science:

Optics and Photonics
Nanotechnology
Biophysics

Background:

Metasurface-based optical manipulation is crucial for applications like single-cell analysis and biosensing.
Existing metasurface platforms lack three-dimensional (3D) manipulation capabilities, limiting practical applications.

Purpose of the Study:

To introduce an on-chip 3D optical manipulation platform utilizing a multifunctional metasurface.
To achieve independent control over spatial degrees of freedom at distinct wavelengths.

Main Methods:

Designed a metasurface using combined geometric and propagation phases.
Employed spatial multiplexing for wavelength-dependent control.
Leveraged the photonic spin Hall effect for 3D manipulation.

Main Results:

Demonstrated dynamic particle manipulation by switching focal positions within a 3D volume.
Achieved stable and tunable 3D particle control with lateral displacement of 24.2 μm and longitudinal displacement of 90 μm.
Showcased independent control of spatial degrees of freedom at distinct wavelengths.

Conclusions:

Presented a novel on-chip 3D optical manipulation platform.
Highlighted the potential of metasurface-based platforms for miniaturized and efficient on-chip manipulation.
Enabled dynamic particle control in three dimensions by tuning incident polarization or wavelength.