Spectral features and optical absorption of vertically stacked V-groove quantum wires Eugenio Giraldo-Tobón, J. L. Palacio, Guillermo L. Miranda and M. R. Fulla Eur. Phys. J. Plus, 137 9 (2022) 1039 Published online: 11 September 2022 DOI: 10.1140/epjp/s13360-022-03219-z