Achromatic beam deflector with electrodynamic phased arrays.

Area of Science:

• Optics and Photonics
• Optical Engineering

Background:

• Flat optics offer compact system designs but suffer from chromatic aberrations due to dispersion.
• Existing diffractive optics solutions are limited to specific wavelength regions or static multi-wavelength steering.
• These limitations hinder dynamic beam steering in full-color display applications.

Purpose of the Study:

• To develop a multi-wavelength optical architecture that mitigates chromatic aberrations for dynamic beam steering.
• To enable achromatic beam deflection across a broad spectrum for advanced optical systems.

Main Methods:

• Implementation of a multi-wavelength optical architecture.
• Integration of color-selective retarders, half-wave plates, polarization plates, and beam deflectors.
• Experimental demonstration using a dynamic phase array in transmission mode.

Main Results:

• Demonstration of an achromatic beam deflector.
• Achieved continuous tunable beam steering over multiple wavelengths (460, 520, and 638 nm).
• Successful mitigation of chromatic aberrations in a dynamic beam steering system.

Conclusions:

• The developed optical architecture effectively addresses chromatic aberrations in flat optics.
• Enables dynamic, achromatic beam steering, paving the way for advanced full-color display technologies.
• Experimental validation confirms the system's capability for multi-wavelength beam manipulation.