Amplified spontaneous emission in semiconductor-nanocrystal/ synthetic-opal composites: Optical-gain enhancement via a photonic crystal pseudogap

Garry R. Maskaly, Melissa A. Petruska, Jagjit Nanda, Ilya V. Bezel, Richard D. Schaller, Han Htoon, Jeffrey M. Pietryga, Victor I. Klimov

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

The effects of the L-point gap on the nanocrystals (NC) spontaneous and stimulated emissions in a synthetic opal infiltrated with a CDSe sol-gel/NC composite were investigated. It was found that despite the low loading of active material, amplified spontaneous emission (ASE) was clearly evident in the infiltrated samples. The sol-gel/NC/PC samples exhibited a reduced ASE threshold ranging from 40 to over 60%, despite a significant decrease in NC volume loading. The results show that in all cases. the ASE lines shift toward the PC L-point gap edges.

Original languageEnglish
Pages (from-to)343-347
Number of pages5
JournalAdvanced Materials
Volume18
Issue number3
DOIs
Publication statusPublished - Feb 3 2006

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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