.png){kind=icon}
.png){kind=icon}
Return
Angle-Independent Topological Interface States in 1D Photonic Crystals with Chalcogenide-Based Hyperbolic Metamaterials
.png){kind=icon}
PRE
AI
A
B
N
DOI：10.1007/s13538-026-02050-6.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
We report a modified topological interface state (TIS) in one-dimensional photonic crystals (1D PhCs) by introducing a hyperbolic metamaterial (HMM) cavity composed of GST and ITO at the interface. This design enables precise control over the spectral position and angular robustness of TIS. Unlike conventional 1D PhCs, where TISs blue-shift with increasing incident angle, the embedded HMM yields an angle-insensitive TIS at 1165 nm with 78% absorption under TM polarisation and an angular sensitivity of only 1.1%. The phase-change behaviour of GST enables dynamic tuning, shifting the TIS from 1162 to 1211.2 nm while maintaining an absorption > 70%. By adjusting the crystallisation level between 0 and 0.4, and leveraging the counteracting effects of temperature and angle, we achieved a zero-shift spectral window. Our findings pave the way for the development of robust, tunable topological photonic platforms for sensing, switching, and active light control.
Keywords:
One-dimensional photonic crystals
Hyperbolic metamaterials
Phase-change materials (GST)
Angle-independent topological interface states
Journal
IF:
1.7
Papers:
189
Citations:
2.3K
Organization
Cited Papers