TITLE

Large asymmetric Stark shift in Ga[sub x]In[sub 1-x]As/InP/InAs[sub y]P[sub 1-y] composite quantum wells

AUTHOR(S)
Aneeshkumar, B.; Silov, A. Yu.; Leys, M.R.; Wolter, J.H.
PUB. DATE
October 2003
SOURCE
Applied Physics Letters;10/6/2003, Vol. 83 Issue 14, p2838
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Strong asymmetric Stark shift in excess of 115 meV of the lowest energy transition has been experimentally observed in composite Ga[sub x]In[sub 1-x]As/InP/InAs[sub y]P[sub 1-y] quantum-well system. In this structure, we can independently control the confinement of electrons and holes by controlling the strain. The photoexcited electrons and holes are confined in spatially separated regions without the application of an electric field. Due to the large asymmetry in the structure, we observed large blueshifts and redshifts of the absorption edge with an applied electric field. All our measurements agree with the calculations within the framework of the Bir–Pikus strain Hamiltonian. © 2003 American Institute of Physics.
ACCESSION #
10964881

 

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