Nonlinear optical properties of wide-gap II–VI bulk semiconductors and microcrystallites

Quantum Confined DC Stark Effect in Microcrystallites

“…For these reasons we ascribe the absorption change in Fig. 1 to a shift of the lowest electron-hole state of the quantum dot [5]. Appearantly, the shift of the excited states is smaller, so that their contribution to AN is of minor importance.…”

“…We have analyzed this using variational methods and the second-order perturbation theory. First results show that the differences in the field induced absorption changes observed by various groups [5,11,121 can be explained by the change of the electric field effect with the ratio between crystallite size and bulk exciton radius. A detailed study will be published elsewhere.…”

“…The present paper reports on the effect of electric fields in the situation of zerodimensional quantum confinement. We have studied the absorption change of CdS microcrystallites embedded in glass under the action of a uniform electric field at room temperature [5].…”

Luminescence Spectra of Quantum-Sized CdS and PbI2Particles in Static Electric Field

“…The Spatial confinement of the carriers motion in the semiconductor nanocrystals results in dramatic transformation of their zone structure, as well as the dynamicS of excited states. There is a number of papers on the influence of external electric field on the linear and nonlinear absorption spectra of the direct-gap semiconductor nanocrystals in various matrices [4][5][6]. The development of quantum-confined Stark effect (QCSE) was observed in many experiments [1,[4][5][6].…”

“…There is a number of papers on the influence of external electric field on the linear and nonlinear absorption spectra of the direct-gap semiconductor nanocrystals in various matrices [4][5][6]. The development of quantum-confined Stark effect (QCSE) was observed in many experiments [1,[4][5][6]. The investigation of high electric field influence on the absorption spectra of the quantum-sized (QS) nanocrystals gives the information about the field-induced perturbations in the energetic levels of nanocrystals.…”