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Carrier dynamics in energy states of InAs/GaAs quantum dots by measuring selective carrier filling and extracting techniques

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6 Author(s)
Jin Soak Kim ; Dept. of Phys., Hanyang Univ., Seoul, South Korea ; Kim, Eun Kyu ; Jun Oh Kim ; Sang Jun Lee
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In summary, the specification of energy levels and size dependence of energy level properties in InAs/GaAs quantum dots (QDs) were studied by using deep-level transient spectroscopy (DLTS) with very small pulse and varying the bias. It appears that the small sized InAs QDs have only one energy state with 121 meV below conduction band edge of GaAs barrier but the large sized QDs have several levels. Then, these total energy levels in QDs were specified. From the signal amplitudes, the population of carrier in single level could be estimated to be 1-2 electrons.

Published in:
Semiconductor Device Research Symposium, 2009. ISDRS '09. International

Date of Conference: 9-11 Dec. 2009

Page(s):
1 - 2
E-ISBN :
978-1-4244-6031-1
Print ISBN:
978-1-4244-6030-4
INSPEC Accession Number:
11060181
Conference Location :
College Park, MD
Digital Object Identifier :
10.1109/ISDRS.2009.5378313
Product Type:
Conference Publications

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