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Selectively Addressing Interleaved Metasurfaces via Dynamically Controlled Talbot Effect
Jiayuan Wang1,2,3, Chao Meng3, Sergey I Bozhevolnyi3
1Department of Physics, Xiamen University, Xiamen 361005, China.
Nano Letters
|April 25, 2025
Summary
This study introduces a new method for controlling optical metasurfaces (MSs). By using the Talbot effect, different functions of interleaved MSs can be activated selectively, reducing crosstalk and improving optical system integration.
Area of Science:
- Optics and Photonics
- Nanotechnology
- Materials Science
Background:
- Optical metasurfaces (MSs) offer miniaturization of optical components due to their design flexibility and subwavelength light control.
- Shared-aperture MSs integrate multiple functions but suffer from simultaneous activation and crosstalk under uniform illumination.
Purpose of the Study:
- To propose and demonstrate a method for selectively addressing multifunctional interleaved metasurfaces (ILMSs).
- To overcome the crosstalk and background issues in shared-aperture MSs.
Main Methods:
- Utilizing the dynamically controlled Talbot effect.
- Configuring a system with a diffraction grating (DG) cascaded with a piezo-controlled polarization-multiplexed ILMS.
- Controlling the DG-ILMS distance to leverage position-dependent Talbot fringes for dynamic activation.
Main Results:
- Experimental demonstration of selectively addressed ILMSs.
- Achieved dynamic activation of different functionalities by controlling Talbot fringes.
- Successfully reduced crosstalk and enhanced background noise.
Conclusions:
- The proposed approach provides a versatile integrated solution for selectively addressing multifunctional ILMSs.
- This work paves the way for advanced multifunctional and highly integrated optical systems.
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