This study presents an electrically-controlled hybrid plasmon-induced transparency (PIT) metadevice leveraging on nematic liquid crystals for enabling active manipulation of terahertz slow light. Achieving Fano-resonant response via near-field coupling of chiral and achiral meta-atoms facilitates nonlinear terahertz generation and mitigates radiative losses. These findings highlight the potential of Fano-resonant active metasurfaces for advanced sensing and slow-light devices.
In this work we, propose a tunable 2D-hydrid epsilon-near-zero (ENZ) platform in telecom windows. Taking advantage to the intrinsically ENZ of the Indium-thin-oxide (ITO) and exploiting the graphene capability to dynamically tune the plasmon polaritons we were able to adjust the cross-over frequency, where the epsilon vanishes, in four telecom bandwidth windows. Additionally, tunabilty can be achieved via electrical gating of the ITO leading to an interplay modulation of the surface plasmon polaritons at the graphene-ITO interface. Furthermore, a giant Purcell factor (PF) was observed at ENZ regimes. These results show how 2D-hybrid ENZ materials potentially find applications in multifunctional nonlinear nanophotonic systems such as ultrafast modulators, data processing and photonic quantum computers (QPCs).
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