Carrier dynamics of electrons in n-type modulation-doped InAs/GaAs quantum dot structure studied using THz time-domain spectroscopy

Seung Jae Oh, Chul Kang, In Hee Maeng, Nam Ki Cho, Jin Dong Song, Won Jun Choi, Jung Il Lee, Joo Hiuk Son

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We have investigated the carrier transport dynamics of n-type modulation-doped InAs/GaAs quantum dots (QDs) using terahertz time-domain spectroscopy (THz TDS) in order to estimate the total number of electrons captured by the QDs. The THz transmission of the sample with QDs is larger than that of the sample without QDs, which implies that the conductivity of sample with QDs is lower than that without QDs. From the THz waveforms and subsequent analysis, the density and mobility of free electrons, which are not captured by the QDs, have been obtained.

Original languageEnglish
Title of host publicationPhysics of Semiconductors - 28th International Conference on the Physics of Semiconductors, ICPS 2006, Part A and B
Pages935-936
Number of pages2
DOIs
StatePublished - 2007
Event28th International Conference on the Physics of Semiconductors, ICPS 2006 - Vienna, Austria
Duration: 24 Jul 200628 Jul 2006

Publication series

NameAIP Conference Proceedings
Volume893
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference28th International Conference on the Physics of Semiconductors, ICPS 2006
Country/TerritoryAustria
CityVienna
Period24/07/0628/07/06

Keywords

  • Carrier transport dynamics
  • Quantum dots
  • Terahertz electromagnetic waves

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