Abstract

An expression is obtained for the oscillator strength of the main exciton transition, computed using a variational procedure in the approximation of an infinitely deep quantum well. It is shown that this quantity is a factor of (a<sub>B</sub>/λ)<sup>2</sup> greater than the oscillator strength in the bulk case (a<sub>B</sub> is the Bohr radius of the bulk exciton, and λ is the variational parameter), and this increases the polariton gap. The modulation effect by a sound wave of the reflectance of light at the longitudinal-exciton frequency in superlattices is considered, along with the diffraction of light at the sound wave. It is shown that these effects can be achieved in superlattices at temperatures one and a half times as great as for bulk crystals and with weaker requirements on their frequency.

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  1. R. A. Ayukhanov, Yu. V. Gulyaev, and G. N. Shkerdin, “Features of acoustooptic interaction in the region of exciton resonance,” Fiz. Tekh. Poluprovodn. 20, 1933 (1986) [Semiconductors20, 1214 (1986)].
  2. D. S. Chemla, “Quasi-two-dimensional excitons in GaAs/AlxGa1-xAs semiconductor multiple quantum well structures,” Helv. Phys. Acta 56, 607 (1983).
  3. R. A. Ayukhanov, Yu. V. Gulyaev, and G. N. Shkerdin, “Linear coefficients of photoelasticity in layered structures with quantum wells close to resonances of quasi-two-dimensional excitons, taking into account the finiteness of the width of the well,” Fiz. Tverd. Tela 35, 1916 (1993) [Phys. Solid State35, 957 (1993)].
  4. R. A. Ayukhanov and G. N. Shkerdin, “Linear coefficients of photoelasticity in multilayer quantum well structures having a sloping bottom in exciton resonance regions,” Fiz. Tverd. Tela 40, 1740 (1998) [Phys. Solid State40, 1582 (1998)].
    [CrossRef]
  5. S. A. Moskalenko, Introduction to the Theory of High-Density Excitons (Shtiintsa, Kishinev, 1983).
  6. Yu. V. Gulyaev and G. N. Shkerdin, “On diffraction theory of electromagnetic waves at sound in semiconductors,” Radiotekh. Elektron. 19, 1075 (1974).

1983 (1)

D. S. Chemla, “Quasi-two-dimensional excitons in GaAs/AlxGa1-xAs semiconductor multiple quantum well structures,” Helv. Phys. Acta 56, 607 (1983).

1974 (1)

Yu. V. Gulyaev and G. N. Shkerdin, “On diffraction theory of electromagnetic waves at sound in semiconductors,” Radiotekh. Elektron. 19, 1075 (1974).

Ayukhanov, R. A.

R. A. Ayukhanov and G. N. Shkerdin, “Linear coefficients of photoelasticity in multilayer quantum well structures having a sloping bottom in exciton resonance regions,” Fiz. Tverd. Tela 40, 1740 (1998) [Phys. Solid State40, 1582 (1998)].
[CrossRef]

R. A. Ayukhanov, Yu. V. Gulyaev, and G. N. Shkerdin, “Linear coefficients of photoelasticity in layered structures with quantum wells close to resonances of quasi-two-dimensional excitons, taking into account the finiteness of the width of the well,” Fiz. Tverd. Tela 35, 1916 (1993) [Phys. Solid State35, 957 (1993)].

R. A. Ayukhanov, Yu. V. Gulyaev, and G. N. Shkerdin, “Features of acoustooptic interaction in the region of exciton resonance,” Fiz. Tekh. Poluprovodn. 20, 1933 (1986) [Semiconductors20, 1214 (1986)].

Chemla, D. S.

D. S. Chemla, “Quasi-two-dimensional excitons in GaAs/AlxGa1-xAs semiconductor multiple quantum well structures,” Helv. Phys. Acta 56, 607 (1983).

Gulyaev, Yu. V.

R. A. Ayukhanov, Yu. V. Gulyaev, and G. N. Shkerdin, “Linear coefficients of photoelasticity in layered structures with quantum wells close to resonances of quasi-two-dimensional excitons, taking into account the finiteness of the width of the well,” Fiz. Tverd. Tela 35, 1916 (1993) [Phys. Solid State35, 957 (1993)].

R. A. Ayukhanov, Yu. V. Gulyaev, and G. N. Shkerdin, “Features of acoustooptic interaction in the region of exciton resonance,” Fiz. Tekh. Poluprovodn. 20, 1933 (1986) [Semiconductors20, 1214 (1986)].

Yu. V. Gulyaev and G. N. Shkerdin, “On diffraction theory of electromagnetic waves at sound in semiconductors,” Radiotekh. Elektron. 19, 1075 (1974).

Moskalenko, S. A.

S. A. Moskalenko, Introduction to the Theory of High-Density Excitons (Shtiintsa, Kishinev, 1983).

Shkerdin, G. N.

R. A. Ayukhanov and G. N. Shkerdin, “Linear coefficients of photoelasticity in multilayer quantum well structures having a sloping bottom in exciton resonance regions,” Fiz. Tverd. Tela 40, 1740 (1998) [Phys. Solid State40, 1582 (1998)].
[CrossRef]

R. A. Ayukhanov, Yu. V. Gulyaev, and G. N. Shkerdin, “Linear coefficients of photoelasticity in layered structures with quantum wells close to resonances of quasi-two-dimensional excitons, taking into account the finiteness of the width of the well,” Fiz. Tverd. Tela 35, 1916 (1993) [Phys. Solid State35, 957 (1993)].

R. A. Ayukhanov, Yu. V. Gulyaev, and G. N. Shkerdin, “Features of acoustooptic interaction in the region of exciton resonance,” Fiz. Tekh. Poluprovodn. 20, 1933 (1986) [Semiconductors20, 1214 (1986)].

Yu. V. Gulyaev and G. N. Shkerdin, “On diffraction theory of electromagnetic waves at sound in semiconductors,” Radiotekh. Elektron. 19, 1075 (1974).

Fiz. Tekh. Poluprovodn. Semiconductors (1)

R. A. Ayukhanov, Yu. V. Gulyaev, and G. N. Shkerdin, “Features of acoustooptic interaction in the region of exciton resonance,” Fiz. Tekh. Poluprovodn. 20, 1933 (1986) [Semiconductors20, 1214 (1986)].

Fiz. Tverd. Tela Phys. Solid State (2)

R. A. Ayukhanov, Yu. V. Gulyaev, and G. N. Shkerdin, “Linear coefficients of photoelasticity in layered structures with quantum wells close to resonances of quasi-two-dimensional excitons, taking into account the finiteness of the width of the well,” Fiz. Tverd. Tela 35, 1916 (1993) [Phys. Solid State35, 957 (1993)].

R. A. Ayukhanov and G. N. Shkerdin, “Linear coefficients of photoelasticity in multilayer quantum well structures having a sloping bottom in exciton resonance regions,” Fiz. Tverd. Tela 40, 1740 (1998) [Phys. Solid State40, 1582 (1998)].
[CrossRef]

Helv. Phys. Acta (1)

D. S. Chemla, “Quasi-two-dimensional excitons in GaAs/AlxGa1-xAs semiconductor multiple quantum well structures,” Helv. Phys. Acta 56, 607 (1983).

Radiotekh. Elektron. (1)

Yu. V. Gulyaev and G. N. Shkerdin, “On diffraction theory of electromagnetic waves at sound in semiconductors,” Radiotekh. Elektron. 19, 1075 (1974).

Other (1)

S. A. Moskalenko, Introduction to the Theory of High-Density Excitons (Shtiintsa, Kishinev, 1983).

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