Phonon-assisted optical absorption in germanium
نویسندگان
چکیده
منابع مشابه
Phonon-assisted optical absorption in silicon from first principles.
The phonon-assisted interband optical absorption spectrum of silicon is calculated at the quasiparticle level entirely from first principles. We make use of the Wannier interpolation formalism to determine the quasiparticle energies, as well as the optical transition and electron-phonon coupling matrix elements, on fine grids in the Brillouin zone. The calculated spectrum near the onset of indi...
متن کاملIntrinsic Optical Absorption in Germanium
Zusammenfassend kann gesagt werden, daß das Verhalten bei hohen Ladungsträgerdichten in beiden Arten der Untersuchungen auf den gleichen Grund zurückzuführen ist. Neben den Abhängigkeiten der effektiven Massen und der g-Faktoren von der Bänderform in der L A N D A U — P E I E R L S und PAULI-Suszeptibilität der Elektronen treten zusätzliche Interbandterme. die proport ional zur Ladungsträgerdichte
متن کاملStudy of phonon modes in germanium nanowires
The observation of pure phonon confinement effect in germanium nanowires is limited due to the illumination sensitivity of Raman spectra. In this paper we measured Raman spectra for different size germanium nanowires with different excitation laser powers and wavelengths. By eliminating the local heating effect, the phonon confinement effect for small size nanowires was clearly identified. We h...
متن کاملZero-phonon linewidth and phonon satellites in the optical absorption of nanowire-based quantum dots.
The optical properties of quantum dots embedded in a catalytically grown semiconductor nanowire are studied theoretically. In comparison to dots in a bulk environment, the excitonic absorption is strongly modified by the one-dimensional character of the nanowire phonon spectrum. In addition to pronounced satellite peaks due to phonon-assisted absorption, we find a finite width of the zero-phono...
متن کاملBias-Induced Optical Absorption of Current Carrying Two-Orbital Quantum Dot with Strong Electron-Phonon Interaction (Polaron Regime)
The one photon absorption (OPA) cross section of a current carrying two-orbital quantum dot (QD) with strong electron-phonon interaction (polaron regime) is considered. Using the self-consistent non-equilibrium Hartree-Fock (HF) approximation, we determine the dependence of OPA cross section on the applied bias voltage, the strength of effective electron-electron interaction, and level spacing ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 2018
ISSN: 2469-9950,2469-9969
DOI: 10.1103/physrevb.98.165207