Optical properties of Si0.8Ge0.2/Si multiple quantum wells

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Abstract

The optical property was studied on the Si0.8Ge0.2/Si strained multiple quantum well (MQW) structure grown using ultra-high vacuum chemical vapor deposition (UHV-CVD). Three peaks are observed in Raman spectrum, which are located at about 510, 410, and 300 cm-1, corresponding to the vibration of SiSi, SiGe, and GeGe phonons, respectively. The photoluminescence (PL) spectrum originates from the radiative recombinations both from the Si substrate and the Si0.8Ge0.2/Si MQW. For Si0.8Ge0.2/Si strained MQW, the transition peaks related to the MQW region observed in the photocurrent (PC) spectrum were preliminarily assigned to electronheavy hole (ehh) and electronlight hole (elh) fundamental excitonic transitions.

Original languageEnglish
Pages (from-to)128-132
Number of pages5
JournalMaterials Science in Semiconductor Processing
Volume14
Issue number2
DOIs
StatePublished - 2011.06

Keywords

  • MQW
  • PC
  • PL
  • Raman
  • SiGe
  • UHV-CVD

Quacquarelli Symonds(QS) Subject Topics

  • Materials Science
  • Engineering - Mechanical
  • Physics & Astronomy

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