Self-consistent model for ambipolar tunneling in quantum-well systems

TL;DR

This paper introduces a self-consistent model for ambipolar tunneling in asymmetric double quantum wells, accurately matching experimental photoluminescence data and extending to tunneling from near-surface wells to surface states.

Contribution

The paper develops a novel self-consistent theoretical framework for ambipolar tunneling in quantum wells, including surface state tunneling, validated by experimental data.

Findings

Model agrees well with photoluminescence experiments

Extends tunneling analysis to surface states

Provides insights into asymmetrical quantum well behavior

Abstract

We present a self-consistent approach to describe ambipolar tunneling in asymmetrical double quantum wells under steady-state excitation and extend the results to the case of tunneling from a near-surface quantum well to surface states. The results of the model compare very well with the behavior observed in photoluminescence experiments in $InGaAs/InP$ asymmetric double quantum wells and in near-surface $AlGaAs/GaAs$ single quantum wells.