Wannier excitons in semiconductor quantum wells with small valence-band offsets: A generalized variational approach

1988 ◽  
Vol 38 (2) ◽  
pp. 1504-1507 ◽  
Author(s):  
Ji-Wei Wu ◽  
A. V. Nurmikko
Keyword(s):  
Quantum Wells ◽  
Valence Band ◽  
Variational Approach ◽  
Band Offsets ◽  
Semiconductor Quantum Wells

A Purely Spectroscopic Technique for Determining Energy Band Offsets in Quantum Wells

1991 ◽  
Vol 240 ◽  
Author(s):  
Emil S. Koteies
Keyword(s):  
Quantum Wells ◽  
Valence Band ◽  
Accurate Determination ◽  
Energy Difference ◽  
Spectroscopic Technique ◽  
Band Offsets ◽  
Band Energy ◽  
Semiconductor Quantum Wells ◽  
Sensitive Function

ABSTRACTWe have developed a novel experimental technique for accurately determining band offsets in semiconductor quantum wells (QW). It is based on the fact that the ground state heavy- hole (HH) band energy is more sensitive to the depth of the valence band well than the light-hole (LH) band energy. Further, it is well known that as a function of the well width, Lz, the energy difference between the LH and HH excitons in a lattice matched, unstrained QW system experiences a maximum. Calculations show that the position, and more importantly, the magnitude of this maximum is a sensitive function of the valence band offset, Qy, which determines the depth of the valence band well. By fitting experimentally measured LH-HH splittings as a function of Lz, an accurate determination of band offsets can be derived. We further reduce the experimental uncertainty by plotting LH-HH as a function of HH energy (which is a function of Lz ) rather than Lz itself, since then all of the relevant parameters can be precisely determined from absorption spectroscopy alone. Using this technique, we have derived the conduction band offsets for several material systems and, where a consensus has developed, have obtained values in good agreement with other determinations.

Photon echo and valence-band mixing in semiconductor quantum wells

1993 ◽  
Vol 47 (23) ◽  
pp. 15679-15687 ◽  
Author(s):  
Y. Z. Hu ◽  
R. Binder ◽  
S. W. Koch
Keyword(s):  
Quantum Wells ◽  
Valence Band ◽  
Photon Echo ◽  
Semiconductor Quantum Wells ◽  
Band Mixing ◽  
Valence Band Mixing

Effect in Changes of Conduction and Valence Band Offsets on Exciton Binding Energy in CdxZn1-xSe/ZnSySe1-ySingle Quantum Wells

2007 ◽  
Vol 46 (1) ◽  
pp. 248-250 ◽  
Author(s):  
Chikara Onodera ◽  
Tadayoshi Shoji ◽  
Yukio Hiratate ◽  
Tsunemasa Taguchi
Keyword(s):  
Binding Energy ◽  
Quantum Wells ◽  
Valence Band ◽  
Exciton Binding Energy ◽  
Band Offsets

Exciton dynamics and valence band mixing in tensile-strained semiconductor quantum wells

2000 ◽  
Vol 15 (2) ◽  
pp. 189-196 ◽  
Author(s):  
E Pérez ◽  
L Viña ◽  
E S Koteles ◽  
K M Lau ◽  
A Di Carlo ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Valence Band ◽  
Exciton Dynamics ◽  
Semiconductor Quantum Wells ◽  
Band Mixing ◽  
Valence Band Mixing
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