-
Chapter
Inelastic Light Scattering by Free Electrons in GaAs Quantum Wires
We review recent inelastic light scattering studies of elementary excitations of the one-dimensional (1D) electron gas in the quantum limit, when only one or two 1D subbands are occupied by electrons. The ligh...
-
Chapter
Optical Properties of Semiconductor Quantum Well Wires
Modulation doped quantum well wires have been fabricated in the one-dimensional (ID) quantum limit, where only the first ID band is occupied. Novel properties have been found in the optical spectra. Strong Fer...
-
Chapter
Hot Exciton Luminescence in Quantum Wells as a Spectroscopic Tool
Hot carrier effects are the subject of much interest in the study of transport properties in semiconductor heterostructures because of their importance in device reliability. The present work is devoted to som...
-
Chapter
Double Raman Resonances in Semiconductor Multiquantum Wells Induced by High Magnetic Fields
Raman resonance profiles have been measured in GaAs/AlAs multiple-quantum wells (MQW) under magnetic fields up to 20T both for (100) and (111) crystal orientations. The intensity of the resonance increases by ...
-
Chapter
Magneto-Optics of [111] GaAs/GaAlAs Quantum Wells
The electronic and optical properties of GaAs/GaAlAs quantum wells (QWs) have been profusely studied in the last twenty years, since its concept was introduced by Esaki and Tsu[l]. Their optical properties are...
-
Chapter
Raman Scattering Study of CdTe/CdMnTe Superlattices
Resonant Raman scattering (RRS) by LO phonons is an optical method which provides information on the relationship between lattice-dynamical and electronic properties of crystals. A resonant enhancement of the ...
-
Chapter
Resonant Raman Scattering in GaAs-AlAs Multiquantum Wells Under Magnetic Fields
Resonant Raman Scattering (RRS) in semiconductor superlattices (SL) and multiquantum wells (MQW) has been extensively studied in recent years in order to obtain information on different aspects of their electr...
-
Chapter
Resonance Raman Scattering in [111]-Oriented CdTe/CdMnTe Superlattices
Cd1-xMnxTe alloys can be grown in zinc-blende structure up to a composition of х~0.7. The band gap of these crystals can be continuously tuned increasing the Mn composition.1 The difference between the band gaps ...
-
Chapter and Conference Paper
Spectroscopic Raman Study of Trifluoroperovskites of Ammonium Under High Pressure
The compounds NH4MF3 (M= Mg, Zn, Co, Mn, Cd) have the cubic perovskite structure at high temperature, distorting to quasi-tetragonal symmetry at lower temperatures (fig. 1). In a previous communication /1/, some ...
-
Chapter and Conference Paper
Resonant Raman Scattering in GaSb-AlSb Superlattices
The electronic properties of GaSb-AlSb superlattices (SL) have been recently analyzed by different experimental techniques showing unambiguously the formation of electronic subbands at the Γ-point 1-2. To our kno...
-
Chapter
Study of the Raman Active Modes for the Suzuki Phase in Doped Alkali Halides
Raman spectroscopy is shown to be an appropriate tool to characterise the Suzuki phase of doped alkali halides. Good agreement is found between our experimental data for 6NaCl:MnCl2, 6NaCl:CdCl2 and 6NaCl:MgCl2 a...