Optical spectrum of monolayer and coaxial quantum wires: Impact of spin-orbit interaction Dorna Najafi, Behrooz Vaseghi, Kavoos Abbasi, Seyed F. Taghizadeh and Ghasem Rezaei Eur. Phys. J. D, 73 12 (2019) 268 Published online: 24 December 2019 DOI: 10.1140/epjd/e2019-100308-6