Influence of Coulomb correlations on the quantum well intersubband absorption at low temperatures

Intersubband thermophotovoltaics

“…Furthermore, many body effects due to the electron-electron interaction that have a proven relevance in semiconductor lasers in both interband [7][8][9][10][11][12][13][14] and intersubband architectures [15][16][17][18][19][20][21][22][23][24][25]. Their relevance for TPV structures is made clear here and this may be particularly important for hot carrier architectures, where a large density of nonequilibrium carriers can be created [26].…”

Two-dimensional Fourier spectroscopy applied to electron-phonon correlations in quantum well intersubband systems

“…[4][5][6][7][8][9][10] There, clear signatures of electron-electron (el-el) and electron-phonon (el-ph) scattering can be observed in the linear excitation regime as line shape broadening and satellite peaks in absorption spectra. [11][12][13] In the nonlinear regime, a large variety of coherent spectroscopy schemes, for example, pump-probe or four wave mixing experiments, have been used to investigate complex many-body interactions in semiconductor nanostructures. 14 In standard transient experiments the ultrafast dynamics are observed as a change of transmission or absorption, [15][16][17] yielding indirect information about the electronic population.…”