Spectrum dispersion element based on the metasurface with parabolic phase

Area of Science:

• Optics and Photonics
• Materials Science
• Nanotechnology

Background:

• Miniaturization of spectrometers requires novel dispersion elements.
• Metasurfaces offer unique electromagnetic field manipulation and ultra-thin properties for novel spectrometer designs.

Purpose of the Study:

• To propose and demonstrate a spectral modulated metasurface as a miniaturized dispersion element.
• To analyze the spectral dispersion capabilities of the metasurface theoretically and experimentally.

Main Methods:

• Design of a metasurface with a parabolic phase profile.
• Theoretical analysis of spectral dispersion based on wavelength-dependent dynamic phase accumulation.
• Experimental demonstration of the metasurface's dispersion capabilities.

Main Results:

• The metasurface effectively disperses different wavelengths of incident light to distinct spatial locations.
• High polarization conversion efficiency was achieved.
• The device exhibits significant spectral modulation capabilities.

Conclusions:

• The spectral modulated metasurface serves as a new, simple, and effective miniaturized dispersion element.
• This technology holds potential for applications in spectrometers, variable filters, and spectrum tomography.
• The high efficiency makes it promising for practical optical device implementation.