Nano Archive

Optical anisotropy in individual porous silicon nanoparticles containing multiple chromophores

Sirbuly, Donald J. and Gargas, Daniel J. and Mason, Michael D. and Carson, Paul J. and Buratto, Steven K. (2008) Optical anisotropy in individual porous silicon nanoparticles containing multiple chromophores. ACS NANO, 2 (6). pp. 1131-1136.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/nn700209f

Abstract

Polarization anisotropy is investigated in single porous silicon nanoparticles containing multiple chromophores. Two classes of nanoparticles, low current density and high current density, are studied. Low current density samples exhibit red-shifted spectra and contain only one or two chromophores. High current density particles, on average, contain less than four chromophores and display a blue-shifted spectrum. We utilize single-molecule spectroscopy to probe the polarization effects of the particles, and we show that both classes of particles are influenced by a polarized excitation source. These results are exciting at the fundamental level for understanding coupled quantum dot emitters as well as for applications involving single-photon sources or silicon-based polarization-sensitive detectors.

Item Type:Article
Uncontrolled Keywords:porous Si; silicon nanocrystals; single-molecule fluorescence; polarization anisotropy
Subjects:Material Science > Nanochemistry
Physical Science > Photonics
ID Code:1875
Deposited By:Farnush Anwar
Deposited On:16 Dec 2008 11:49
Last Modified:16 Dec 2008 11:49

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