Efficient light redirection via stretched field resonance in dielectric meta-resonator

Area of Science:

• Photonics
• Metamaterials
• Integrated Circuits

Background:

• Light redirection is crucial for photonic integrated circuits (PICs).
• Existing methods face limitations in efficiency and design flexibility.
• Applications span from microwave to visible frequencies.

Purpose of the Study:

• To propose a new strategy for efficient light redirection and splitting.
• To utilize a two-dimensional photonic crystal array as a low effective index (n_eff << 1) dielectric resonator.
• To achieve high redirection efficiency beyond 90%.

Main Methods:

• Designing a one-direction semi-enclosed meta-resonator.
• Treating the photonic crystal array as a dielectric resonator.
• Employing numerical simulations and experimental verification.

Main Results:

• Achieved light redirection and splitting efficiency exceeding 90%.
• Demonstrated significant collimating radiations with zero phase delay using a low effective index meta-resonator.
• Showcased design flexibility for modulating operating frequencies through geometrical and structural parameters.

Conclusions:

• The proposed meta-resonator strategy offers a high-efficiency solution for light redirection in PICs.
• This approach provides an alternative to zero-index materials for achieving collimated light.
• The strategy is extendable to other artificial metamaterials and 3D structures, advancing integrated photonics.