Dielectric suppression and its effect on photoabsorption of nanometric semiconductors

Chang Q. Sun, X. W. Sun, B. K. Tay, Shu Ping Lau, Haitao Huang, S. Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

51 Citations (Scopus)


Deeper insight is presented into the origin of the dielectric suppression and its effect on the photoabsorption of nanometric semiconductors. Consistency between modelling predictions and experimental observations reveals that the dielectric suppression originates from the enhancement of the crystal field due to surface bond contraction and the rise of the surface-to-volume ratio with decreasing particle size. The suppression of the dielectric function will lead to a blue shift in photoabsorption edges, which may find application in microelectronic and photonic devices of nanometre scales.
Original languageEnglish
Pages (from-to)2359-2362
Number of pages4
JournalJournal of Physics D: Applied Physics
Issue number15
Publication statusPublished - 7 Aug 2001
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films


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