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Related Experiment Video

Updated: May 16, 2026

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

Published on: July 18, 2015

High efficiency, high selectivity ultra-thin resonant diffractive elements.

Svetlen Tonchev¹, Thomas Kämpfe, Olivier Parriaux

¹University of Lyon, Laboratoire Hubert Curien UMR CNRS 5516, Saint-Etienne, France.

|November 29, 2012

Summary

This summary is machine-generated.

Resonant diffractive elements with ultra-shallow surface reliefs show enhanced diffraction efficiency and selectivity. This is achieved by coupling surface corrugations with surface waves across various materials.

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Last Updated: May 16, 2026

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Area of Science:

Optics and Photonics
Materials Science

Background:

Resonant diffractive elements leverage surface corrugations and surface waves.
Subwavelength surface reliefs are crucial for enhanced optical properties.

Purpose of the Study:

To demonstrate the boosted diffraction efficiency and high selectivity of resonant diffractive elements.
To showcase the versatility of these structures across different material systems and the optical spectrum.

Main Methods:

Fabrication of ultra-shallow subwavelength surface reliefs using slow wet etching.
Experimental validation of resonant functional structures across diverse material systems.

Main Results:

Achieved boosted diffraction efficiency in resonant diffractive elements.
Demonstrated high selectivity properties due to the coupling of surface corrugations and surface waves.
Confirmed the effectiveness of slow wet etching for fabricating structures with negligible lateral broadening.

Conclusions:

Ultra-shallow subwavelength surface reliefs enable high-performance resonant diffractive elements.
The demonstrated approach is applicable to a wide range of materials and optical frequencies.
Slow wet etching is a suitable fabrication method for these precise nanostructures.