Active Tunable Pulse Shaping Using MoS ₂ ‐Assisted All‐Dielectric Metasurface

While optical pulse shapers have important applications in classical and quantum communication regimes laser resonant cavities, engineering of group delay dispersion (GDD) remains one their greatest challenges. Herein, by taking advantage the electrically tunable properties 2D material low-loss nature dielectric material. This paper demonstrates how an active all-dielectric metasurface assisted can be leveraged to shape temporal profile a pulse. The proposed consists array nanobars covered sheet positioned on distributed Bragg reflector (DBR) as perfect mirror design phase-only modulator. Upon introducing in-plane asymmetries, quasi-bound state continuum (QBIC) resonance emerges under normal incidence, which subsequently leads achieving both significant GDD two stretching compressing via boosting effect permittivity variation molybdenum disulfide (MoS2). monolayer MoS2 proves excellent substitute for other materials with inherent dissipative loss visible frequency range. Following such geometrically fixed configuration, various pulse-shaping operations are achieved, including compression (peak intensity up 350%), expansion from 60%), splitting, higher-order distortion.