Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Properties and turning of intraband optical absorption in inxga1-xas/gaas self-assembled quantum dot superlattice
AU - Liu, B.
AU - Zhuang, Qiandong
AU - Yoon, S. F.
AU - Dai, J. H.
AU - Kong, M.Y.
AU - Zeng, Y. P.
AU - Li, J. M.
AU - Lin, L. Y.
AU - Zhang, J. H.
PY - 2001
Y1 - 2001
N2 - We investigated properties of intraband absorption in InxGa1-xAs quantum dots (QDs) superlattice. Energy levels in conduction band in QDs were calculated for a cone-shaped quantum dot associated with coupling between QDs in the framework of the effective-mass envelope-function theory. Theoretical results demonstrated that energy levels in conduction band were greatly affected by the vertical coupling between quantum dots, which can be used to modify transition wavelength by adjusting the space layer thickness. Intraband transition is really sensitive to normal incidence and the absorption peak intensity is dependent on the polarization. A satisfying agreement is found between theoretical and experimental values. This result opens up prospects for the fabrication of QDs infrared detectors, which work at atmospheric windows.
AB - We investigated properties of intraband absorption in InxGa1-xAs quantum dots (QDs) superlattice. Energy levels in conduction band in QDs were calculated for a cone-shaped quantum dot associated with coupling between QDs in the framework of the effective-mass envelope-function theory. Theoretical results demonstrated that energy levels in conduction band were greatly affected by the vertical coupling between quantum dots, which can be used to modify transition wavelength by adjusting the space layer thickness. Intraband transition is really sensitive to normal incidence and the absorption peak intensity is dependent on the polarization. A satisfying agreement is found between theoretical and experimental values. This result opens up prospects for the fabrication of QDs infrared detectors, which work at atmospheric windows.
U2 - 10.1142/S0217979201004800
DO - 10.1142/S0217979201004800
M3 - Journal article
VL - 15
SP - 1959
EP - 1968
JO - International Journal of Modern Physics B
JF - International Journal of Modern Physics B
SN - 0217-9792
IS - 13
ER -