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Optical constants of MoS2 (Molybdenum disulfide)
Yim et al. 2014: 2-nm film; n,k 0.38–0.90 µm

Wavelength: µm
 (0.382159–0.894152)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Conditions & Spec sheet

n_is_absolute: true
wavelength_is_vacuum: true
film_thickness: 1.99e-9
substrate: SiO2/Si

Comments

1.99 nm film synthesized by vapor phase sulfurization. ~290 nm thick SiO2 substrate thermally grown on <100> oriented crystalline Si wafer.

References

C. Yim, M. O'Brien, N. McEvoy, S. Winters, I. Mirza, J. G. Lunney and G. S. Duesberg. Investigation of the optical properties of MoS2 thin films using spectroscopic ellipsometry, Appl. Phys. Let. 104, 103114 (2014)

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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