Designing a unique 2D/1D assembly for an efficient detection of the full IR spectrum

Efficient detection of IR spectrum persists to be the centre-stage activity of opto-electronic detectors because of its application in the field of night vision, surveillance, remote sensing and thermal imaging. We have investigated the optical performance of a series of 2D/1D lateral and vertical hetero-structures, consisting of the monolayers of Graphene or MoS₂ and nanowires of Te (TeNW). With the help of first-principles calculations, we predict that a detection of the full IR spectrum can be materialized with MoS₂/TeNW and Graphene/TeNW lateral and vertical hetero-structures. The band-gap modulation of MoS₂ due to the presence of quantum confined s-p hybridized states of Te at the MoS₂/TeNW assembly materializes a potential photo-detection in the near IR range. The interaction of Te-5p and s-p hybridized states of Graphene at the interfacial contact region opens a small band gap for the Graphene/TeNW assembly and thereby renders it to be a potential system for far-IR detection.