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Hybrid MoS2-Plamonic Absorber Covering the Whole Visible Spectrum: Application to Design Transistor Like Photodetectors

Plasmonics, ISSN: 1557-1963, Vol: 19, Issue: 1, Page: 59-64
2024
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Article Description

In this article, a novel MoS based wideband absorber is proposed that covers the whole visible spectrum. The structure is composed of a single MoS layer on top of a Si/SiO distributed Bragg reflector. Coupled Au Nanospheres are utilized on top of the MoS layer that broaden the absorption spectrum as a result of the coupling between the plasmonic modes of individual particles. By optimizing the geometrical features of the plasmonic Nano-antennas, a high absorption value reaching more than 80% in the range of 400–600 nm is obtained which decreases to 50% at 700 nm. The application of the proposed structure in designing a wideband visible light photodetector is discussed either.

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