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Optical constants of MoS2 (Molybdenum disulfide)
Islam et al. 2021: monolayer (1L) film; n,k 0.190–1.70 µm

Wavelength: µm
 (0.190–1.700)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Conditions & Spec sheet

film_thickness: 1L
substrate: SiO2/Si

Comments

Monolayer film (1L, step height 0.61 nm). In-plane (ordinary ray, o).

References

K. M. Islam, R. Synowicki, T. Ismael, I. Oguntoye, N. Grinalds, M. D. Escarra. In-plane and out-of-plane optical properties of monolayer, few-layer, and thin-film MoS2 from 190 to 1700 nm and their application in photonic device design. Adv. Photonics Res., 2021 2000180 (Numerical data kindly provided by Kazi Islam)

Data

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INFO

Molybdenum disulfide, MoS2

Molybdenum disulfide (MoS2) is a naturally occurring, dark gray or black compound that feels similar to graphite. This similarity is due to its layered structure where each molybdenum atom is sandwiched between two sulfur atoms in a trigonal prismatic coordination. The layers are held together by weak van der Waals forces, allowing them to easily slide over each other. This property renders MoS2 useful as a lubricant in various applications. Optically, MoS2 has gained significant attention because, when exfoliated to single layers, it behaves as a direct bandgap semiconductor, making it highly relevant for optoelectronic devices. Thin layers of MoS2 have been investigated for their use in transistors, sensors, and other nanoscale devices due to their unique electronic and optical properties.

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