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Field-Programmable Mobile Magneto-Photonic Metaparticles for Active Light Manipulation and Steering.

Seung Yeol Lee¹, Yujie Luo¹, Ognjen Ilic¹

¹Department of Mechanical Engineering, University of Minnesota, Minneapolis, USA.

Advanced Materials (Deerfield Beach, Fla.)

|July 15, 2026

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Researchers developed mobile magneto-photonic metaparticles for active light control. These magnetically steered microstructures enable programmable beam steering in complex environments, advancing applications in imaging and therapy.

Area of Science:

Photonics
Materials Science
Nanotechnology

Background:

Controlling light flow in complex environments is crucial for applications like deep-tissue imaging and phototherapy.
Current methods rely on external optics or limited nanoparticle scatterers, necessitating mobile agents for active light delivery and steering.
There is a need for microscale agents capable of precise, programmable light manipulation within dynamic media.

Purpose of the Study:

To introduce magneto-photonic metaparticles, mobile microstructures combining magnetic actuation with photonic metasurfaces.
To demonstrate active, programmable control over light steering using these hybrid agents.
To explore the potential for advanced metaparticle designs and scalable fabrication.

Main Methods:

Keywords:

active beam steering functional microparticles magnetic actuation mobile optical elements nanoimprint lithography optical metasurfaces

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Fabrication of polymeric metaparticles integrating a magnetic core with a nanoimprinted photonic surface.

Utilizing magnetic fields for actuation, enabling programmable translation and rotation of the metaparticles.

Characterizing the locomotion and beam-steering capabilities of the metaparticles in aqueous media.

Main Results:

Successful creation of mobile magneto-photonic metaparticles with controlled locomotion.
Demonstration of active, magnetically programmable beam steering in real-time.
Proof-of-concept for a versatile platform combining metasurface optics with magnetic mobility.

Conclusions:

Magneto-photonic metaparticles offer a novel approach for active photonic control in complex environments.
The hybrid design merges reconfigurability of metasurfaces with mobility of magnetic actuation.
This platform is scalable and adaptable for sophisticated light-steering applications.