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Inter-Sub-Level Spectroscopy of P-Type Modulation-Doped Ge Quantum Dots

Published online by Cambridge University Press:  10 February 2011

J. L. Liu ,
W. G. Wu ,
G. Jin ,
Y. H. Luo ,
S. G. Thomas ,
Y. Lu  and
K. L. Wang
J. L. Liu
Affiliation:
Device Research Laboratory, Department of Electrical Engineering, University of California at Los Angeles, Los Angeles, CA 90095-1594, jliu@ee.ucla.edu
W. G. Wu
Affiliation:
Device Research Laboratory, Department of Electrical Engineering, University of California at Los Angeles, Los Angeles, CA 90095-1594
G. Jin
Affiliation:
Device Research Laboratory, Department of Electrical Engineering, University of California at Los Angeles, Los Angeles, CA 90095-1594
Y. H. Luo
Affiliation:
Device Research Laboratory, Department of Electrical Engineering, University of California at Los Angeles, Los Angeles, CA 90095-1594
S. G. Thomas
Affiliation:
Device Research Laboratory, Department of Electrical Engineering, University of California at Los Angeles, Los Angeles, CA 90095-1594
Y. Lu
Affiliation:
Device Research Laboratory, Department of Electrical Engineering, University of California at Los Angeles, Los Angeles, CA 90095-1594
K. L. Wang
Affiliation:
Device Research Laboratory, Department of Electrical Engineering, University of California at Los Angeles, Los Angeles, CA 90095-1594
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Abstract

Inter-sub-level transitions in p-type modulation-doped Ge quantum dots are observed. The structure is grown by molecular beam epitaxy and consists of 30 periods of Ge quantum dots separated by 6 nm boron-doped Si layers. An absorption peak in the mid-infrared range is observed at room temperature by Fourier transform infrared spectroscopy, and is attributed to the transition between the first two heavy hole states of the Ge quantum dots. This study suggests the possible use of modulation-doped Ge quantum dots for improved infrared detector application.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 571: Symposium W – Semiconductor Quantum Dots , 1999 , 15
Copyright
Copyright © Materials Research Society 2000

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References

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