The Design and Development of a Metamaterial Absorber for Enhancing Broadband Light Absorption in Quantum Dot Photodetecting Applications

Abstract

Abstract Recent advancements in nanostructured photodetectors have led to the development of a new metamaterial absorber design that enables control of light absorption and prevents the loss of photons. An optical simulation studied a broadband plasmonic metamaterial absorber using two-dimensional MXene (Ti3C2Tx) with arrays of tetragram shapes. By altering the angles of the edges of the tetragrams, the broadening of absorption can be tuned, resulting in high-efficiency absorption rates of over 90% for a broad range of wavelengths from 1200 nm to 2500 nm. Additionally, the coupling of PbS quantum dots to the colloidal plasmonic structure has been demonstrated, resulting in enhanced photon absorption capability of PbS QDs. This broadband PbS QD metamaterial absorber can be used as the channel in near-IR phototransistor devices. These findings contribute significantly to the field of photonics and have important implications for developing new and improved photodetectors.