标题： 可机械重构的梯度折射率透镜概念用于聚焦和波束成形应用 显示英文标题

标题： Mechanically Reconfigurable GRIN Lens Concept for Focusing and Beamforming Applications

摘要： 本研究提出了一种机械可重构的梯度折射率（GRIN）透镜的前瞻性概念，用于聚焦和波束成形应用。该透镜由波纹层构成，每一层实现一个以切比雪夫多项式为基础的折射率分布。焦点位置通过移动GRIN透镜层来控制。针对在不同焦距下聚焦的三种情况，采用基于几何光学的方法进行处理。几何光学结果通过数值模拟进行了验证，由于建模近似和结构细粒度，观察到一些差异。我们还讨论了该概念在红外波长下工作的可扩展性。 显示英文摘要

摘要： This study presents a prospective concept of a mechanically reconfigurable Gradient Index (GRIN) lens for focusing and beamforming applications. The lens is formed by corrugated layers, each realizing a refractive index profile expressed in a basis of Chebyshev polynomials. The focal point position is controlled by shifting the GRIN lens layers. A geometrical optics-based approach is implemented for the three scenarios of focusing at varying focal distance. The geometrical optics results are validated by numerical simulations, with some discrepancies observed due to modeling approximations and structural granularity. We also discuss scalability of the proposed concept for operation at infrared wavelengths.