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On the Design of Soret Zone Plates Based on Binary Sequences Using Directional Transducers.

Pilar Candelas¹, Sergio Pérez-López¹, José Miguel Fuster¹

¹Centro de Tecnologías Físicas, Universitat Politècnica de València, 46022 València, Spain.

Sensors (Basel, Switzerland)

|September 28, 2021

Summary

The arrangement of transparent zones in Soret Zone Plates (SZP) significantly impacts focusing, especially for directional applications like acoustics and microwaves. This distribution is critical for optimizing transmission efficiency and focusing enhancement.

Keywords:

acoustic focusing binary sequence cantor set fractal zone plate

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Area of Science:

Optics and Photonics
Acoustics and Microwaves
Materials Science

Background:

Soret Zone Plates (SZP) are diffractive optical elements used for focusing.
Binary sequences offer a method to design the transparent regions of SZP.
Directional transducers in fields like acoustics and microwaves can benefit from optimized focusing.

Purpose of the Study:

To analyze the impact of transparent Fresnel region distribution in binary sequence-based SZP on their focusing profiles.
To investigate the transmission efficiency and focusing enhancement factor of these SZP.
To validate theoretical models with experimental measurements.

Main Methods:

Theoretical analysis of Soret Zone Plates based on binary sequences.
Calculation of transmission efficiency and focusing enhancement factor.
Experimental validation using Cantor ternary set sequences.

Main Results:

The distribution of transparent Fresnel regions significantly affects the focusing profile of SZP.
This effect is particularly important for directional transducers in acoustics and microwaves.
Experimental results validated the theoretical model, confirming the critical role of transparent region distribution.

Conclusions:

The spatial arrangement of transparent Fresnel zones is a critical design parameter for Soret Zone Plates.
Optimizing this distribution enhances performance in applications requiring directional emission, such as acoustics and microwaves.
Binary sequences provide a versatile approach for designing SZP with tailored focusing characteristics.