A single diffractive optical element for implementing spectrum-splitting and beam-concentration functions simultaneously with high diffraction efficiency

TL;DR

This paper introduces a novel single diffractive optical element that combines spectrum-splitting and beam-concentration functions with high efficiency, optimized through a new algorithm suitable for modern fabrication methods.

Contribution

A new design method and optimization algorithm for a single DOE that integrates spectrum-splitting and beam-concentration functions with high diffraction efficiency.

Findings

High optical focusing efficiency demonstrated in simulations

Design optimized within practical thickness constraints

Potential application in high-efficiency solar cells

Abstract

In this paper, a novel method is proposed, and employed to design a single diffractive optical element (DOE) for implementing spectrum-splitting and beam-concentration (SSBC) functions simultaneously. We develop an optimization algorithm, through which the SSBC DOE can be optimized within an arbitrary thickness range, according to the limitations of modern photolithography technology. Theoretical simulation results reveal that the designed SSBC DOE has a high optical focusing efficiency. It is expected that the designed SSBC DOE should have practical applications in high-efficiency solar cell systems.