Abstract
Heterostructures of two-dimensional transition metal dichalcogenides (TMDCs) have recently received an upsurge of attention for application in optoelectronics. In this paper, we demonstrate efficient absorber van der Waals heterostructures in a form of air/hetero-TMDCs/substrate with various TMDC monolayers (, , , and ). The dielectric permittivity of individual TMDC monolayers is determined using the Lorentz model. The absorption response of the designed heterostructure-TMDCs is determined by using the transfer matrix method. The effects of light polarization, angle of incident, and substrate on the absorption response are investigated. Finally, and heterostructures on the substrate are found to have absorption over 30% in a broadband wavelength range and in a wide incident angle, both useful designs for optoelectronic applications.
© 2018 Optical Society of America
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