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Analytic solution for double optical metasurface beam scanners.

Jingru Wang1, Yuehe Ge2, Zhizhang David Chen3,4

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This study introduces a novel beam-steering system using double metasurface lenses (metalenses). This compact and cost-effective optical device offers precise light beam control, overcoming limitations of traditional systems.

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Area of Science:

  • Optics and Photonics
  • Metamaterials Science

Background:

  • Optical devices are increasingly researched for novel functionalities, with metasurfaces offering lightweight and compact solutions.
  • Existing beam-steering systems face challenges in size, cost, and integration.

Purpose of the Study:

  • To propose and develop a new beam-steering system utilizing double metasurface lenses (metalenses).
  • To derive analytical solutions for beam steering and address system limitations like blind zones.

Main Methods:

  • Derivation of exact close-form forward and numerical inverse solutions based on the generalized Snell's law of refraction.
  • Application of global optimization algorithms to determine metalens orientations for desired pointing positions.
  • Analysis of system parameters to understand scan region and blind zone dynamics.

Main Results:

  • Accurate determination of pointing position based on double metalens orientations.
  • Development of a method to eliminate blind zones within the beam-steering system.
  • Demonstration of a lightweight, compact, and cost-effective beam-steering solution.

Conclusions:

  • The proposed double metalens system provides a novel and efficient approach for light beam control.
  • This system offers advantages in size, weight, cost, and integration compared to traditional systems like double Risley prisms.
  • The derived methods enable precise control and optimization of beam-steering functionalities.