Charge Carriers’ States and Optical Transitions in CdS/HgS/CdS Core/Shell/Shell Cylindrical Nanostructure in the Presence of Strong Uniform Electrostatic Field

Abstract

AbstractThe single-particle states of charge carriers and optical transitions in a cylindrical layered \(\beta \)-CdS/\(\beta \)-HgS/\(\beta \)-CdS core/shell/shell nanoheterostructure (quantum nanotube) in the presence of a strong lateral uniform electrostatic field are considered in this report. The consideration is carried out for the case, when the strong size quantization regime is realized for charge carriers in the HgS layer of the structure under consideration. It is shown that a strong external field radically changes the nature of the movement of charge carriers along the angular variable. Expressions for the envelope wave functions and energy spectrum of charge carriers in \(\beta \)-HgS in the presence of an external field are obtained in an explicit analytical form. The threshold frequency of interband transitions under the action of an electrostatic field is shifted towards low frequencies. The external field also leads to an explicit dependence of the intensity of interband transitions on the effective masses of charge carriers.KeywordsCore/shell/shellElectronic statesElectrostatic fieldOptical transitions