Folded acoustic modes and photoelastic coefficients in superlattices

Control of spin dynamics with laser pulses: Generation of entangled states of donor-bound electrons in aCd1−xMnxTe quantum well

“…These so-called folded acoustic phonons have been extensively studied with spontaneous Raman scattering methods 66 and, more recently, the generation of coherent folded acoustic phonons using light pulses has received much attention. 67,68,69,70 A simple calculation using parameters from the literature 71,72,73 shows that the frequency of the longitudinal-acoustic mode at k = 2π/d is close to that of the high-frequency oscillation in Fig. 17.…”

Bandgap Engineering of Quantum Semiconductor Microstructures

“…The difference between the most energetic state in the valance band and the lowest energy state in the conduction band determines the QW energy gap, E g QW , (a). Example of room-temperature photoluminescence spectrum from a GaAs/Al 0.35 Ga 0.65 As QW microstructure (b) (Aithal et al 2017) (1993); Adachi et al (1994); Yenice et al (1994); Labrie and Dubowski (1994;Takagi et al (1994); Syme et al (1997); Lockwood et al (1998).…”