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ICOP & ICPET 2017, 23 - : 1033-1036 Back to browse issues page
Determination of Permittivity and Absorption of WSe2 Monolayers in the Visible Wavelength
Narges Ansari * 1, Farinaz Ghorbani , Maryam Moradi
Abstract:   (965 Views)

Two dimensional transition metal dichalcogenide (TMDC) layers with direct band gap have opened new research horizon for application in photonics and optoelectronics. WSe2 monolayer from TMDCs family shows interesting optical properties. In this paper, we applied the Lorentz model to determine the permittivity of single WSe2 layer in visible and infrared range and found good agreement with those of experimental results. The absorption of the structure is similar to imaginary component of the single WSe2 layer and absorption peaks are found to be coincidence with Lorentz resonance wavelength. We furthermore investigate the absorption of single WSe2 layer on different substrates which is commonly used in experiments. It is found that the substrate has an important role to reduce the absorption and absorption decreases with increasing the refractive index of substrate. Our results can be useful to design optoelectronic devices designed based on TMDCs. 

Keywords: absorption, Lorentz model, permittivity, transition metal dichalcogenide, WSe2 monolayer
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Type of Study: Research | Subject: Special
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Ansari N, Ghorbani F, Moradi M. Determination of Permittivity and Absorption of WSe2 Monolayers in the Visible Wavelength. ICOP & ICPET. 2017; 23 :1033-1036
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Volume 23 - Back to browse issues page
انجمن اپتیک و فوتونیک ایران Optics and Photonics Society of Iran
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