Metamaterial structures of variable and gradient basis orientations embedded with periodic linear defects: phase...

Area of Science:

• * Photonics and Materials Science
• * Nanotechnology and Optics

Background:

• * Metamaterial structures with gradient refractive index variations are crucial for integrated photonics, optoelectronics, and advanced imaging.
• * Existing metamaterials offer potential but require precise fabrication for specific applications like color filtering.

Purpose of the Study:

• * To design and experimentally realize gradient metamaterial structures with embedded linear periodic defects.
• * To investigate the application of these structures in on-substrate color filtering using simulation.
• * To demonstrate computational control over defect size and gradient amplitude.

Main Methods:

• * Interference of phase-engineered plane beams in a double cone geometry to create 2D gradient metamaterials.
• * Interference with an axial plane beam for 3D gradient metamaterials with linear defects.
• * Computational control of interference angles to modulate defect size and gradient amplitude.

Main Results:

• * Successful design and experimental realization of gradient metamaterial structures with linear defects.
• * Demonstration of tunable defect size and spatial gradient amplitude through computational adjustments.
• * Proposed application in on-substrate color filtering via simulation.

Conclusions:

• * Gradient metamaterial structures with linear defects can be fabricated with controlled optical properties.
• * These structures show promise for on-substrate color filtering applications.
• * The developed structures are suitable for integration into optical circuits and metalenses for enhanced light-matter interactions.