Square Quantum Wire Under The Electric Field In The Exciton State

Exciton states in quantum wells and wires formed by semiconductor heterostructure have attracted great attention during the past three decades. Electric field applied perpendicularly to the layer of quantum wells can change the optical properties ( abstraction , reflection and photoluminescence ) of semiconductor quantum wells structures . This effect is referred to as the quantum-confined Stark effect (QCSE); it has been studied extensively in the past two decades for application of lower optical switches and modulators.Recently, exciton in low dimension semiconductor structures in the presence of a uniform electric field has been studied extensively. The ground-state binding energy of an exciton confined in quantum wires and quantum wells in the presence of a uniform electric field has been calculated under the effective-mass approximation using variational approach. In this paper, the binding energy of heavy-hole exciton in a square quantum wire for infinite potential barrier in the presence of electric field has been investigated using variational approach. The importance of our results have been imposed:(1) The first band energy of the electron and hole is decreased in the presence of electric field; on the other hand, the second band energy of the electron and hole is increased in the presence of electric field.(2) When the width of the quantum wire is constants,...