Dr Paul Kinsler. [Acknowledgements & Feedback]

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Importance of confined longitudinal optical phonons in intersubband and backward scattering in rectangular AlGaAs - GaAs quantum wires.

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<>   JN: JOURNAL OF APPLIED PHYSICS, 1993, Vol.74, No.3, pp.2097-2099      
<>   IS: 0021-8979    
<>   DT: Note 
<>   AB: The important role of confined longitudinal optical (LO) and surface
<>       optical (SO) phonons is investigated for different types of    
<>       individual scattering processes in AlGaAs/GaAs quantum wires.     
<>       Electron wave function tailing due to finite barrier height has been
<>       properly taken into account. We demonstrate that for highly confined 
<>       wires structures L(y) = L(z) = 40 angstrom, forward and backward
<>       scattering are dominated by SO phonons. For 80 angstrom x 80 angstrom
<>       structures, forward scattering is still predominately by SO phonons  
<>       while backward scattering is dominated by confined LO phonons.
<>       Finally, for 150 angstrom x 150 angstrom, confined phonons control 
<>       both forward and backward scattering. However, we demonstrate that
<>       confined LO phonons play a dominant role in intersubband transitions
<>       even in highly confined structures, and that it has the most
<>       significant effect on the backward scattering in quantum wires of 
<>       L(y) = L(z) > 80 angstrom.

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