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Related Experiment Video

Updated: Jun 20, 2026

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

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Diffraction efficiency of reflection gratings with a parabolic section profile.

P Langlois, R Beaulieu

|September 24, 2009

Summary

Reflection gratings with parabolic grooves create many diffracted waves of similar intensity. This study presents theoretical and experimental findings for these holographic diffraction gratings at 780 nm.

Area of Science:

Optics and Photonics
Materials Science

Background:

Diffraction gratings are crucial optical components used in various spectroscopic and photonic applications.
Understanding the diffraction behavior of novel grating profiles is essential for advancing optical device performance.

Purpose of the Study:

To analyze the diffraction properties of reflection gratings featuring a parabolic groove profile.
To investigate the generation of multiple diffracted waves with comparable intensities from these structures.

Main Methods:

Theoretical analysis of diffraction from parabolic groove gratings.
Experimental verification using holographic diffraction gratings fabricated in photoresist.
Measurements conducted at a wavelength of 780 nm.

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Main Results:

Parabolic groove reflection gratings produce a significant number of diffracted waves.
These diffracted waves exhibit similar intensity distributions.
Experimental results align with theoretical predictions at 780 nm.

Conclusions:

Parabolic groove gratings offer unique diffraction characteristics with potential for specialized optical applications.
The ability to generate numerous waves of similar intensity could be leveraged in beam shaping or multiplexing technologies.