ArticleScientific reports2025
Room temperature operated short-wave infrared phototransistor optimized via MXene-based metamaterial absorber structure.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Recent advances in nanostructured photodetectors have enabled precise control over light absorption while minimizing photon losses. In this work, we demonstrate a plasmonic metamaterial absorber based on two-dimensional MXene (Ti₃C₂Tₓ) featuring geometrically tunable tetragram-shaped arrays. Through finite-difference time-domain (FDTD) simulations and structural optimization, we achieved over 90% photon absorption across the broadband spectral range of 1000-2500 nm, representing a significant enhancement in operational bandwidth. By incorporating HgTe quantum dots (QDs) as an intermediate spacer layer, we developed a hybrid plasmonic-QD phototransistor that leverages gap surface plasmon resonance effects to enhance low-energy photon absorption. This configuration resulted in substantial improvements in current density and achieved a detectivity of 1.46 × 10¹¹ Jones at room temperature. Our findings demonstrate a scalable platform for high-sensitivity broadband photodetection with promising applications in advanced optical sensing systems.
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