Enhanced photoluminescence and photonic bandgap modification from composite photonic crystals of macroporous silicon and nanocrystalline PbS thin films

N. Gutman*, A. Armon, A. Sa'Ar, A. Osherov, Y. Golan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

We report on the fabrication of composite photonic crystals (PCs) of macroporous silicon and PbS thin films and about their passive and active optical properties. We have measured a redshift in the composite PC photonic stopbands relative to those of the PC substrate. In addition, we have measured a high extraction efficiency of the photoluminescence from the embedded PbS films due to band-edge singularities and slow-light modes of a defect-free two-dimensional composite PC. The peak extraction efficiency has been found to be six times larger than that of planar unpatterned PbS films.

Original languageAmerican English
Article number073111
JournalApplied Physics Letters
Volume93
Issue number7
DOIs
StatePublished - 2008

Bibliographical note

Funding Information:
This work was partially funded by the Israel Science Foundation (ISF), Grant No. 1298/07.

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