TITLE

Midinfrared photoconductivity of Ge/Si self-assembled quantum dots

AUTHOR(S)
Rappaport, N.; Finkman, E.; Brunhes, T.; Boucaud, P.; Sauvage, S.; Yam, N.; Le Thanh, V.; Bouchier, D.
PUB. DATE
November 2000
SOURCE
Applied Physics Letters;11/13/2000, Vol. 77 Issue 20
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have investigated the midinfrared photoconductivity of Ge/Si self-assembled quantum dots. The self-assembled quantum dots were grown by ultra-high-vacuum chemical vapor deposition on Si(001). The photoresponse of the p-type device exhibits resonances in the midinfrared around 10 μm wavelength. The resonance of the photocurrent shifts to lower energy as the applied bias increases. The photocurrent is weakly dependent on the incoming polarization of the infrared light. The photocurrent is analyzed in terms of bound-to-bound and bound-to-continuum transitions in the valence band. The photocurrent peaks are correlated to the photoluminescence of the device. © 2000 American Institute of Physics.
ACCESSION #
4413866

 

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