Effects of hydrostatic pressure and temperature on refractive index changes in tuned quantum dots under magnetic field

Abstract

The effects of external magnetic field, hydrostatic pressure, temperature and radius of the quantum dots (QDs) on refractive index changes (RICs) of tuned QDs are studied in detail theoretically. In the framework of effective mass approximation, energy levels and wave functions are derived. Simultaneously, the nonlinear RICs are obtained by compact-density-matrix approach and iterative method. Then, the numerical simulations show that under various constraint factors, the resonant peak position of RICs moves to high energy or low energy, that is, blue shift or red shift, and the peak value of RICs will also alter with the change of parameters.

External Field‐induced Transitions in Quantum Dot: Role of Noise‐anharmonicity Interplay

“…The discontinuous field delivers energy to the dot at times t ¼ nt R . The average of this energy may be determined by integrating eqn (41) over time and we obtain…”

“…In this context, a few works that reside in the research frontier of QD systems merit mention. [40][41][42] Harnessing the effective confinement potential (ECP) of QD is a key issue as it modulates its energy spectrum and the eigenstates. Such modulation makes external control of the physical properties of QDs quite viable and opens up new avenues of manufacturing advanced quantum devices.…”

“…In consequence, we find a rich amount of studies devoted to the low‐dimensional nanostructures [1–11] with special emphasis on their nonlinear optical ( NLO ) properties [12–39] . In this context, a few works that reside in the research frontier of QD systems merit mention [40–42] …”