@misc{10481/106584,
year = {2025},
month = {9},
url = {https://hdl.handle.net/10481/106584},
abstract = {In this work, the ground and low-lying excited states in a GaAs coupled quantum dot-ring
embedded in an AlGaAs cylindrical matrix are computed under the assumption of a finite
confinement potential and an axisymmetric model by means of the finite element method
and the effective mass approximation. The electron energy levels are studied as functions
of the intensity of externally applied electric and magnetic fields. Electromagnetically
induced transparency in the ladder configuration and linear optical absorption coefficient
are calculated thereupon. Our results suggest that magnetic fields are more suitable
than electric fields for controlling the optical properties of this nanostructure. Also, we
found that the system’s response, however, exhibits a striking asymmetry: while the
electromagnetically induced transparency is unexpectedly quenched under positive electric
fields due to vanishing dipole transition matrix elements, this limitation is completely
overcome by a magnetic field. Its application not only restores optical transparency across
the full range of electric field values but also drives substantially larger energy level shifts
and clear Aharonov–Bohm oscillations, making it a far more robust tool for controlling the
optical properties of confined electrons in dot-ring coupled heterostructures.},
organization = {Spanish Junta de Andalucía (PREDOC-01408)},
organization = {RA MESCS Higher Education and
Science Committee (Research project N° 23RL-1C005)},
publisher = {MDPI},
keywords = {coupled quantum dot-ring},
keywords = {electronic states},
keywords = {electric field effects},
title = {Electromagnetically Induced Transparency in a GaAs Coupled Quantum Dot-Ring},
doi = {10.3390/nano15181455},
author = {Herrero Hahn, Rebeca Victoria and Giraldo-Neira, A. S. and Vinasco, J. A. and Gil-Corrales, J. A. and Morales, A. L. and Duque, C. A.},
}