Hyperbolic dispersion and plasmon-polariton gap induced by off-diagonal anisotropy in photonic heterostructures

Key Points

• The study reveals the presence of a plasmon-polariton gap at normal incidence in photonic heterostructures, which is pivotal for enhancing optical properties.
• Investigation shows that tuning the frequency near the plasmon-polariton gap transforms the elliptic dispersion relation into hyperbolic dispersion.
• Assessment using transfer matrix techniques provides insights into the effects of anisotropic metamaterials on dispersion within layered systems.
• Highlights the importance of off-diagonal anisotropy, suggesting significant implications for future optical applications and material designs.

Abstract