The non-linear terahertz response of hot electrons in low-dimensional semiconductor superlattices: Suppression of the polar-optical phonon scattering
arXiv:1704.03321 · doi:10.1063/1.5005914
Abstract
We study the response of low-dimensional semiconductor superlattices to strong terahertz fields on condition of a strong suppression of inelastic scattering processes of electrons caused by the polar-optical phonons. For our study we employ a balance equations approach which allows investigating the response of the superlattices to strong terahertz fields taking account of both the inelastic and the strongly pronounced elastic scattering of electrons. Our approach provides a way to analyze the influence of the Bloch dynamics of electrons in a superlattice miniband side by side with the effects of the electron heating on the magnitude and the frequency dependence of a superlattice current responsivity in the terahertz frequency band. Our study shows that the suppression of the inelastic scattering caused either by a reduction of the superlattice dimensionality by lateral quantization or by a strong magnetic field application can give rise to a huge enhancement of the current responsivity. This enhancement can be interpreted in terms of the well pronounced electronic bolometric effect occurring due to the efficient electron heating in the low-dimensional superlattices by the incident terahertz fields.
arXiv comment31 pages, 6 figures, quantum dots, wires
References in corpus (11)
- Semiconductor Superlattices: A model system for nonlinear transport
- Intersubband gain in a Bloch oscillator and Quantum cascade laser
- Superradiance Lattice
- Electron transport in quantum wire superlattices
- Theory of parametric amplification in in superlattices
- Current responsivity of semiconductor superlattice THz-photon detectors
- THz parametric gain in semiconductor superlattices in the absence of electric domains
- Spin-dependent THz oscillator based on hybrid graphene superlattices
- Physical Principles of the Amplification of Electromagnetic Radiation Due to Negative Electron Masses in a Semiconductor Superlattice
- Excitation of relaxation oscillations in a semiconductor superlattice by incident waves: efficient terahertz harmonics generation
- Continuous third harmonic generation in a terahertz driven modulated nanowire