Band structure and intersubband absorption in modulation-doped V-groove quantum wires Available to Purchase

A self-consistent nonparabolic calculation of the band structure and intersubband absorption in a V-groove-quantum-wire are presented and analyzed with respect to doping concentration, geometry, and temperature. A comparison with a parabolic flatband model shows that both the self-consistency and the nonparabolicity considerably affect subband edges and the intersubband absorption which are studied when both effects are taken into account. The absorption spectra exhibit a prominent peak in the terahertz region (wavelength range $λX=55−95μm$⁠) for the polarization in the direction of the weak confinement $(X)$⁠, while for polarization in the direction of the strong confinement $(Y)$⁠, it shows two groups of peaks, one in a slightly lower wavelength range than for the $X$ polarization, and the second for $λY=8−13μm.$ Technological parameters considered in our analysis can be used to tailor and adjust the absorption spectra for various applications in the terahertz spectral range.