Surface potential-adjusted surface states in 3D topological photonic crystals

Area of Science:

• Photonics
• Condensed Matter Physics
• Materials Science

Background:

• Surface potential is known to localize waves in topological matter.
• Exploiting surface potential in topological photonic systems remains an underexplored area.
• Dielectric double gyroid (DG) photonic crystals offer a unique platform for manipulating light-matter interactions.

Purpose of the Study:

• To demonstrate the induction and control of photonic surface states via surface potential in DG photonic crystals.
• To investigate the relationship between surface potential, wave localization, and pseudomagnetic fields.
• To explore the potential of surface treatments in 3D photonic systems.

Main Methods:

• Utilizing the basis translation within the unit cell of DG photonic crystals to tune surface potential.
• Fabricating gradually modulated DG photonic crystals to generate a pseudomagnetic field.
• Analyzing the resulting photonic surface states and their localization properties.

Main Results:

• Photonic surface states were successfully induced and controlled by surface potential.
• The degree of wave localization was directly regulated by the tunable surface potential.
• Gradual modulation of DG photonic crystals led to the generation of a pseudomagnetic field, influencing surface states.

Conclusions:

• Surface potential plays a critical role in localizing waves within topological photonic systems.
• The interplay between surface potential and pseudomagnetic fields significantly impacts surface states in 3D photonic crystals.
• Surface treatments are essential for optimizing photonic systems and expanding the scope of surface states.