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Ultrafast Terahertz Dynamics in Hybrid Van der Waals Superconductor‐Topological Insulator Metamaterials
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Ultrafast Terahertz Dynamics in Hybrid Van der Waals Superconductor‐Topological Insulator Metamaterials
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Journal Article
Ultrafast Terahertz Dynamics in Hybrid Van der Waals Superconductor‐Topological Insulator Metamaterials
2026
Overview
Hybrid van der Waals heterostructures that combine topological insulators with high‐temperature superconductors offer a promising platform for tunable terahertz (THz) photonics compatible with cryogenic quantum technologies. We present a theoretical and numerical study of ultrafast THz modulation in proximitized (Bi2‐xInx)Se3 interfaced with Bi2Sr2CaCu2O8+δ. Indium‐driven topological phase transitions enable selective control of THz transmission, yielding a tuning depth of 23.8% and a resonance shift of 111 GHz. Under ultrafast optical excitation, the hybrid system reaches a modulation depth of 30.4%, a frequency shift of 52 GHz, and a group delay of 0.71 ps. These results provide a design framework for topological–superconducting metamaterials and indicate their potential for dynamic THz control in quantum photonic architectures. Hybrid van der Waals topological–superconducting heterostructures enable cryogenically compatible, highly tunable THz photonic circuits. We model ultrafast THz modulation in proximitized (Bi2‐xInx)Se3–BSCCO devices, capturing indium‐driven topological phase transitions and ultrafast superconductor dynamics. The system delivers up to 30% modulation depth, >100 GHz frequency tuning, and sub‐picosecond delays, paving the way toward ultrafast THz quantum technologies.
Publisher
John Wiley & Sons, Inc,Wiley-VCH
