Time-resolved spectroscopy of InAs quantum dots using one-side modulation-doping technique: Renormalization and screening

Joo In Lee, Hyung Gyoo Lee, Eun Joo Shin, Sungkyu Yu, Kasi Viswanath, Dongho Kim, Gukhyung Ihm

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

We present the optical properties of modulation-doped InAs/GaAs quantum dots (QDs). Bandgap renormalization is clearly observed from a red shift of the emission peaks on the QDs with various modulation-doping concentrations, demonstrating that exchange interactions of electrons within single states have no effect on renormalization. Screening due to the electrons at modulation-doped layer as well as the photo-generated carriers in GaAs matrix plays an important role in reducing the radiative recombination rate.

Original languageEnglish
Pages (from-to)122-126
Number of pages5
JournalMaterials Science and Engineering B
Volume51
Issue number1-3
DOIs
Publication statusPublished - 1998 Feb 27

Bibliographical note

Funding Information:
This work was supported financially by the Ministry of Science and Technology. One of the authors (Hyung Gyoo Lee) acknowledges financial support from the Non-directed Research Fund under National Special Support Project (#95-F32) of Chungbuk National University, and the Ministry of Education under contact no. BSRI-96-2435.

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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