TITLE

Space-charge electric field in photorefractive multiple quantum wells

AUTHOR(S)
Xiangxue Zhang; Samiullah, Mohammad; Ping Yu
PUB. DATE
April 2010
SOURCE
Applied Physics Letters;4/12/2010, Vol. 96 Issue 15, p152106
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have developed a graphical method to determine the space-charge electric field in photorefractive multiple quantum wells when the photocurrent is dominated by the drift current. The minima and maxima of the space-charge electric field due to space modulated light intensity are obtained from photocurrent measurements under uniform illumination. In addition, we find that the space-charge field depends nonlinearly on the applied electric field and the intensity of light, and changes sharply with the intensity up to a critical intensity beyond which it remains unchanged.
ACCESSION #
49193316

 

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