Modulation of optical properties with multilayer thickness in antimonene and indiene   

Matko Mužević1, Maja Varga Pajtler1, Sanjeev Kumar Gupta2, Igor Lukačević1* 

1Department of Physics, Josip Juraj Strossmayer University of Osijek, Trg Ljudevita Gaja 6, Osijek, 31000, Croatia

2Department of Physics and Electronics, St. Xavier’s College, Ahmedabad, 380009, India

DOI: 10.5185/amlett.2019.2220

Publication Date (Web): Jan 10, 2019

E-mail: ilukacevic@fizika.unios.hr

Abstract

Optical properties of 2D materials can be effectively modulated by employing multilayer structures with different number of layers. Using the theoretical approach based on density functional theory we simulated relevant optical spectra of antimony and indium mono- and multilayers. We showed that the electronic band structures of antimonene and indiene possess numerous tracking bands enhancing the transition probability. Therefore, high absorption coefficients are found. Modelled multilayer nanostructures of antimonene and indiene experience a red-shift of absorption bands. Antimonene exhibits an optical directional anisotropy regarding the absorbance coefficient and reflectance spectrum for different nanolayer thicknesses. Indiene possesses very high reflectance and refractive index in the visible and IR spectrum which can be effectively modulated by the number of layers. Our work shows that antimonene and indiene multilayers harbour untapped potential for the optical applications at the nanoscale.

Keywords

2D materials, antimony, indium, optical properties, density functional theory.

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