Premium
Plasmonic effects and optical properties of InN composites with In nanoparticles
Author(s) -
Shubina T. V.
Publication year - 2010
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200983105
Subject(s) - plasmon , nanocomposite , materials science , photocurrent , nanoparticle , cathodoluminescence , optoelectronics , plasmonic nanoparticles , absorption (acoustics) , semiconductor , nanotechnology , composite material , luminescence
Nanocomposites comprising metallic nanoparticles (MNPs) inside a semiconductor matrix are promising materials for plasmonics suggesting a new concept of light manipulation and generation. Optical properties of the nanocomposites are controlled by localized plasmons (Mie resonances) in the MNPs. The basic properties of the nanocomposites have been studied using InN/In with In clusters formed both spontaneously and by the periodic deposition of In insertions. In the specially designed nanocomposites, the spots of intense cathodoluminescence are strongly correlated with the agglomerations of the In MNPs due to plasmon‐induced enhancement. Furthermore, a strong difference is discovered between the onsets of thermally detected absorption and photocurrent. This feature is a key to distinguish InN/In from pure InN. To simulate the plasmonic effects in the nanocomposites a model has been proposed, which considers the clusters as spheroids of random shapes and orientations. The calculated dependences are in reasonable agreement with obtained optical data.