scholarly journals Topologically guaranteed enhancement of nonlinear optical conductivity of graphene in the presence of spin-orbit coupling

2014 ◽  
Vol 90 (23) ◽  
Author(s):  
Zheng Liu ◽  
Matthew Sanderson ◽  
J. C. Cao ◽  
C. Zhang
Keyword(s):  
Optical Conductivity ◽  
Nonlinear Optical ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit

scholarly journals Spin-orbit coupling effect on electronic, linear and nonlinear optical properties of Bi2S3 and the Ternary Bismuth Sulfide Bi2S2.75Se0.25: Ab-initio calculations

2021 ◽  
Author(s):  
Houda Ben Abdallah ◽  
Walid Ouerghui
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Experimental Studies ◽  
Orbit Coupling ◽  
Optical Absorption Coefficient ◽  
Optical Parameters ◽  
High Electron ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Bismuth Sulfide

Abstract Although the relevant properties of the bismuthinite \({Bi}_{2}{S}_{3}\), it was recently approved that the substitution of Se atoms in the \({Bi}_{2}{S}_{3}\) lattice can significantly enhance its electro-optical properties. In the present work, a detailed study on the structural, electronic and optical properties of \({Bi}_{2}{S}_{2.75}{Se}_{0.25}\) has been carried out based on first principle calculations. The simultaneous effect of Se-doping and spin-orbit coupling (SOC) on bismuth sulfide \({Bi}_{2}{S}_{3}\) was investigated. Our calculations show that \({Bi}_{2}{S}_{2.75}{Se}_{0.25}\) exhibits a narrow direct band gap of 1.062 eV after inclusion of the (SOC). The calculation of the carrier effective masses indicates that \({Bi}_{2}{S}_{2.75}{Se}_{0.25}\) may possess a high electron mobility material which is in accordance with experimental studies. The linear absorption optical spectra for both \({Bi}_{2}{S}_{3}\) and \({Bi}_{2}{S}_{2.75}{Se}_{0.25}\)show that doping bismuthinite with (Se) increases the optical absorption coefficient in the visible range and takes a value up to \(10 {10}^{5}{cm}^{-1}\). In addition, the dielectric function, optical conductivity and the energy loss function of \({Bi}_{2}{S}_{3}\) and \({Bi}_{2}{S}_{2.75}{Se}_{0.25}\)were also derived. The addition of the (Se) content induces a red shift in agreement with experimental studies. A noticeable effect of the (SOC) on the linear optical parameters was observed. The stability of the excitons was also studied by the estimation of the binding energy value. The dispersion energy parameters of \({Bi}_{2}{S}_{3}\) and \({Bi}_{2}{S}_{2.75}{Se}_{0.25}\)were estimated using a single oscillator model. Some nonlinearities have been computed with and without inclusion of (SOC) showing that \({Bi}_{2}{S}_{2.75}{Se}_{0.25}\)with large nonlinear optical parameters is promising candidate in photonic switching applications.

Spin-Orbit Coupling and Interband Transitions in the Optical Conductivity of Sr2RhO4

2017 ◽  
Vol 119 (26) ◽  
Author(s):  
Luke J. Sandilands ◽  
Wonshik Kyung ◽  
So Yeun Kim ◽  
J. Son ◽  
J. Kwon ◽  
...  
Keyword(s):  
Optical Conductivity ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Interband Transitions

Emulation of spin-orbit coupling for solitons in nonlinear optical media

2020 ◽  
Vol 101 (5) ◽  
Author(s):  
Huagang Li ◽  
Xing Zhu ◽  
Boris A. Malomed ◽  
Dumitru Mihalache ◽  
Yingji He ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Optical Media ◽  
Nonlinear Optical Media
Sign in / Sign up

Export Citation Format

Share Document