TY - JOUR JF - opsi JO - ICOP & ICPET _ INPC _ ICOFS VL - 22 IS - 0 PY - 2016 Y1 - 2016/2/01 TI - Study of Optical Properties of Single-layer Molybdenum disulfide by Tight Binding Method TT - Study of Optical Properties of Single-layer Molybdenum disulfide by Tight Binding Method N2 - In this research, band structure and band gap energy of molybdenum disulfide is simulated by tight binding method. For this purpose, we assumed orbitals of Mo atom and orbitals of S atom to describe the near conductance and valence band states. The direct band gap, obtained by the nearest neighbor approximation, is equal to 1.85 eV. We used a semi classical approach by exploiting Hamiltonian matrix and perturbation theory to investigate the optical properties of single-layer MoS2. Optical parameters such as imaginary and real part of dielectric function have been calculated via kramers-kronig transformation and the electron energy loss spectrum calculated and compared with experimental as well as first principle calculations. The numerical analysis in this paper has been carried out by coding in MATLAB. These studies are important since the monolayer MoS2 has been envisaged for applications in the optoelectronic devices such as photo detectors, solar cells and light emitting diodes. SP - 818 EP - 821 AU - nayeri, maryam AU - fathi pour, morteza AU - Yazdanpanah Goharrizi, arash AD - Faculty of Electrical Engineering, ShahidBeheshti University, Tehran, Iran. KW - Molybdenum disulfide KW - optical properties KW - dielectric function UR - http://opsi.ir/article-1-928-fa.html ER -