Electron states in a semiconductor quantum ring in parallel magnetic field

Lowest eigenenergy states of electrons in a semiconductor quantum ring with cylindrical geometry have been evaluated in the presence of external magnetic field, applied parallel to the plane of the quantum ring. Kinetic energy is modified by the appearance of a vector potential due to the magnetic field thus controlling the electron energy-eigenvalues inside the ring. Time-independent Schrödinger equation is solved with appropriate boundary conditions, and first and second-order Bessel functions are considered for computation of energy subbands. Non-monotonic spacing of quantized electron energy states have been observed by changing different dimensions as well as changing magnetic field considering n-GaAs material. Tailoring of dimension and magnetic field helps to obtain absorption and emission spectra, making it suitable for photonic applications.