Simulation of quantum wells with ‘spikes’ and ‘dips’

Abstract

The use of thin high-bandgap 'spikes' or thin low-bandgap 'dips' inside conventional rectangular quantum wells (QWs) gives supplementary flexibility in engineering intra-and inter-band energy level separation. The paper presents simulation and experimental studies on the effects of 'spikes' and 'dips' on the fundamental quantum well properties.Keywords Non-square quantum wells · Thin high-bandgap 'spikes' · Thin low-bandgap 'dips' · Short red wavelength range

Tailor-made Quantum Well-in-a-Well Systems: Their Bound States and Scattering Properties

“…A study has shown, for example, that n-doped parabolic quantum wells absorb far-infrared radiation at the bare-harmonic-oscillator frequency independent of electron-electron interactions and the number of electrons in the well [1]. Another device is that of a heterostructure made from a high bandgap "spike" placed in the middle of a rectangular quantum well which showed a reduced material gain leading to an increased threshold current [2]. Furthermore, simulations on a diode laser based on strained non-square shaped quantum well yield enhanced radiative current performance as compared to a device based on an optimal square well of the same width and emission length [3].…”