Synthesis of Passive Lossless Metasurfaces Using Auxiliary Fields for Reflectionless Beam Splitting and Perfect...

Area of Science:

• Electromagnetics
• Metamaterials
• Optics

Background:

• Metasurfaces offer powerful control over electromagnetic waves.
• Achieving complex beam manipulation with passive, lossless elements remains a significant challenge.
• Existing methods often struggle with local power conservation requirements.

Purpose of the Study:

• To introduce a novel paradigm for the accurate design of metasurfaces.
• To enable intricate beam manipulation functionalities previously unattainable with passive lossless elements.
• To address the challenge of local power conservation in metasurface design.

Main Methods:

• Developing a design paradigm based on the self-generation of auxiliary evanescent fields.
• Ensuring that these auxiliary fields facilitate local power conservation without affecting far-field performance.
• Deriving exact reactive solutions for specific beam manipulation tasks.

Main Results:

• Demonstration of a new design paradigm for metasurfaces.
• Successful implementation of functionalities previously considered impossible for passive lossless elements.
• Exact reactive solutions provided for reflectionless beam splitting and perfect reflection.
• Verification of the proposed scheme through full-wave simulations.

Conclusions:

• The proposed paradigm enables accurate metasurface design for complex beam manipulation.
• Self-generation of evanescent fields is a viable strategy for achieving local power conservation.
• The presented solutions for reflectionless beam splitting and perfect reflection are exact and validated.