Review of optical properties of two-dimensional transition metal dichalcogenides

Andrew Voshell; Mauricio Terrones; Mukti Rana

doi:10.1117/12.2323132

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7 September 2018 Review of optical properties of two-dimensional transition metal dichalcogenides

Andrew Voshell; Mauricio Terrones; Mukti Rana

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Proceedings Volume 10754, Wide Bandgap Power and Energy Devices and Applications III; 107540L (2018) https://doi.org/10.1117/12.2323132
Event: SPIE Optical Engineering + Applications, 2018, San Diego, California, United States

Abstract

Two dimensional (2D) materials have become a growing subject in the last 15 years mainly due to the isolation of graphene, which created a completely different class of material based on its unique, monolayer design. Since then, various stable materials of few atoms thick are showing emerging capabilities in optical electronics and photonics. Semiconducting monolayers of transition metal dichalcogenides (TMDs) such as MoS₂, Mo_1-xWxS₂, and WS₂ exhibit direct electronic band gaps; bulk crystals display indirect band gaps. Interestingly, these 2D materials show significant light interaction over a broad bandwidth ranging from infrared to ultraviolet wavelengths. The materials allow photodetection in this bandwidth without the need of cooling, thus creating new potential for uncooled detection. In this review, we discuss various 2D materials and their interaction with light for photodetection applications.

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Andrew Voshell, Mauricio Terrones, and Mukti Rana "Review of optical properties of two-dimensional transition metal dichalcogenides", Proc. SPIE 10754, Wide Bandgap Power and Energy Devices and Applications III, 107540L (7 September 2018); https://doi.org/10.1117/12.2323132

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KEYWORDS

Molybdenum

Absorbance

Photodetectors

Excitons

Absorption

Semiconductors

Phototransistors

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