Anisotropic carrier and exciton confinement in T-shaped quantum wires revealed by magneto-photoluminescence

W. Langbein, H. Gislason, J.M. Hvam, J. Zeman

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


Summary form only given.The realization of one-dimensional (1D) semiconductor nanostructures with large confinement energies is of importance for device applications. Different techniques such as growth on tilted substrates (Serpentine superlattices) or prepatterned substrates (V-groove quantum wires) and the cleaved-edge overgrowth of T-shaped structures have been demonstrated. For the T-shaped structures, the confinement energy has been recently increased to above 2k/sub B/T at room temperature by optimizing structure parameters. A decreased exciton diameter in the [110] direction in the wire compared with the [110] well was revealed by magneto-photoluminescence. We determine here the extension of the T-shaped quantum wire (T-QWR) state in both confining directions [110] and [001] to verify its 1D character, as shown for crescent-shaped wires.
Original languageEnglish
Title of host publicationTechnical Digest. Summaries of Papers Presented at the International Quantum Electronics Conference. Conference Edition. 1998 Technical Digest Series, Vol.7 (IEEE Cat. No.98CH36236)
Number of pages2
Publication statusPublished - 1998
Externally publishedYes


  • anisotropic magnetoresistance
  • excitons
  • carrier confinement
  • potential well
  • substrates
  • magnetic confinement
  • wire
  • semiconductor nanostructures
  • semiconductor superlattices
  • temperature


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