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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 15 — May. 20, 2009
  • pp: 2842–2846

Synthesis and optical spectroscopic studies of semiconducting cadmium sulfide nanowires

Narayanan Kuthirummal, Jason Reppert, Brian Dihel, and Apparao M. Rao  »View Author Affiliations

Applied Optics, Vol. 48, Issue 15, pp. 2842-2846 (2009)

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Optical properties of cadmium sulfide nanowires of 50 100 nm diameter prepared by the pulsed-laser vaporization method have been studied using photoacoustic, UV-Vis, Raman, and photoluminescence spectroscopy. The photoacoustic (PA) technique yielded clean spectra with a steeper absorption edge for as-prepared opaque semiconducting CdS nanowires when compared to the corresponding con ventional optical absorption spectra. The PA signal intensity was also significantly higher for nanowires. The Raman spectrum revealed increased exciton–longitudinal-optical-phonon coupling. The appearance of a narrow photoluminescence peak at 491 nm (FWHM 9 nm ) and the absence of emission above 500 nm demonstrate the high quality of nanowires. High-resolution transmission electron microscopy showed excellent ordering of the atoms in the [ 001 ] planes perpendicular to the growth direction.

© 2009 Optical Society of America

OCIS Codes
(300.6470) Spectroscopy : Spectroscopy, semiconductors
(160.4236) Materials : Nanomaterials

ToC Category:

Original Manuscript: February 9, 2009
Revised Manuscript: April 2, 2009
Manuscript Accepted: April 20, 2009
Published: May 11, 2009

Narayanan Kuthirummal, Jason Reppert, Brian Dihel, and Apparao M. Rao, "Synthesis and optical spectroscopic studies of semiconducting cadmium sulfide nanowires," Appl. Opt. 48, 2842-2846 (2009)

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