This paper presents a comprehensive study of the optical properties of a hybrid metal-dielectric double gyroid (DG) structure, emphasizing its polarization-dependent characteristics and anomalous dispersion phenomena. Utilizing finite-difference time-domain (FDTD) simulations, we investigate the band structure, circular dichroism (CD) indices, and coupling indices of the hybrid DG to explore the existence of polarization-specific band gaps and complete band gaps. Our findings demonstrate that the hybrid DG exhibits distinct right-handed circularly polarized (RCP) and left-handed circularly polarized (LCP) band gaps, which can be finely tuned by adjusting the dielectric refractive index and the volume fraction of the structure. The study also reveals high coupling indices for specific modes, indicating efficient light-matter interaction, which is crucial for the development of advanced photonic devices such as sensors and optical filters. Furthermore, we analyze the anomalous dispersion properties of the hybrid DG, including negative refraction, which opens possibilities for innovative applications like superlenses and cloaking devices. These results highlight the versatility and potential of hybrid metal-dielectric gyroids for next-generation photonic applications, offering tunable and customizable optical properties that can be tailored to meet the demands of various technological domains. The insights gained from this research provide a deeper understanding of gyroid-based materials and pave the way for their practical implementation in sophisticated optical systems.
Tài liệu tham khảo
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