Applied optics. Multiwavelength achromatic metasurfaces by dispersive phase compensation

Area of Science:

• Photonics and optical engineering
• Metasurface technology
• Diffractive optics

Background:

• Diffractive optics offer miniaturization but suffer from significant chromatic aberrations.
• These aberrations arise from wavelength-dependent phase shifts in diffractive elements.
• Existing solutions for chromatic aberration correction are often bulky and complex.

Purpose of the Study:

• To overcome chromatic aberrations in diffractive planar optical components.
• To demonstrate a metasurface design that achieves wavelength-independent angular deflection.
• To present a planar lens with corrected chromatic aberrations at multiple wavelengths.

Main Methods:

• Designing metasurfaces with engineered wavelength-dependent phase shifts.
• Utilizing low-loss dielectric resonators to create a dense spectrum of optical modes.
• Implementing dispersive phase compensation through tailored metasurface structures.

Main Results:

• Demonstrated a metasurface design that deflects three different wavelengths by the same angle.
• Presented a novel planar lens exhibiting no chromatic aberrations for three specific wavelengths.
• Validated the use of dielectric resonators for achieving precise phase control.

Conclusions:

• Metasurface-based planar photonics can effectively suppress chromatic aberrations.
• This technology enables the development of compact, lightweight, and chromatically corrected optical systems.
• Potential applications include advanced collimators for displays and high-performance imaging systems.