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Related Experiment Video

Updated: May 10, 2026

Convergent Polishing: A Simple, Rapid, Full Aperture Polishing Process of High Quality Optical Flats & Spheres

Convergent Polishing: A Simple, Rapid, Full Aperture Polishing Process of High Quality Optical Flats & Spheres

Published on: December 1, 2014

Broadband converging plano-concave lens.

Rui Yang¹, Zhenya Lei, Lei Chen

¹School of Electronic Engineering, Xidian University, Xi’an 710071, China. ruiyang.xidian@gmail.com

|July 2, 2013

Summary

A novel plano-concave lens with a gradient index profile offers broadband illumination, focusing, and beam steering capabilities. This design enables efficient manipulation of electromagnetic fields for versatile optical applications.

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Area of Science:

Optics and Photonics
Metamaterials and Nanophotonics

Background:

Traditional lenses face limitations in broadband performance and beam manipulation.
Gradient index (GRIN) optics offer advanced light control capabilities.

Purpose of the Study:

To propose and demonstrate a plano-concave lens with a tailored geometric profile and transformational gradient index.
To achieve broadband illumination, focusing, collimation, and steerable/multiple beam generation.

Main Methods:

Nonresonant synthesis using a perforated dielectric plate.
Integration of dielectric rod arrays for precise refractive index control.

Main Results:

The proposed lens effectively focuses and collimates electromagnetic fields.
Demonstrated capability for steerable and multiple beam generation with high efficiency.
Achieved broadband operation suitable for practical implementation.

Conclusions:

The developed plano-concave gradient index lens provides a versatile platform for advanced optical functionalities.
The nonresonant synthesis approach ensures a wide operating frequency band and practical feasibility.