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High-temperature superconductor (HTS) BSCCO-based coherent terahertz (THz)sources have shown great potential as one of the leading solid-state platformsin THz science and technology. Stable, and chip-scale photonic components mustbe developed to effectively and efficiently control and manipulate theircoherent radiation, especially for future communication systems and networkapplications. Here, we report on the design, simulation and modelling ofultrafast THz metamaterial photonic integrated circuits, on a few nanometersthick HTS BSCCO van der Waals (vdWs), capable of the active modulation of phasewith constant transmission coefficient over a narrow frequency range.Meanwhile, the metamaterial circuit works as an amplitude modulator withoutsignificantly changing the phase in a different frequency band. Under theapplication of ultrashort optical pulses, the transient modulation dynamics ofthe THz metamaterial offer a fast switching timescale of 50 ps. The dynamics ofpicosecond light-matter interaction_ Cooper pairs breaking, photoinducedquasiparticles generation and recombination, phonon bottleneck effect, emissionand relaxation of bosons_ in BSCCO vdWs metamaterial arrays are discussed forthe potential application of multifunctional superconducting photonic circuitsin communication and quantum technologies.

Ultrafast terahertz superconductor van der Waals metamaterial photonic switch