Confined optical phonons in a GaAs single quantum well in a GaAs/AlxGa1−xAs heterostructure

Citations Over Time

Abstract

We report the observation of confined longitudinal-optical (LO) phonons in the first-order Raman spectrum of a GaAs/${\mathrm{Al}}_{\mathrm{x}}$${\mathrm{Ga}}_{1\mathrm{\ensuremath{-}}\mathrm{x}}$As single quantum well. They are observed when the energy of the scattered radiation comes into the resonance with the electronic transitions of the quantum well, the resonance being tuned with temperature or with a tunable dye laser. The confined LO phonons observed in the first-order Raman spectrum have wave vectors extending to a significant fraction of the Brillouin zone and their frequencies agree well with those deduced from the bulk dispersion curve.

Related Papers

• → Special points for Brillouin-zone integrations(1976)68,812 cited
• → Zone edge phonons in CdS1−xSex(1977)52 cited
• → Phonons in superlattices: II. A microscopic approach(1991)3 cited
• → Raman Probe of the Brillouin Zone for Nonequilibrium Phonons in GaAs(1984)
• → Brillouin zones and energy bands(1991)