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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 9, Iss. 3 — Mar. 6, 2014

Laser-induced photodynamic effects at silica nanocomposite based on cadmium sulphide quantum dots

S. S. Voznesenskiy, A. A. Sergeev, A. N. Galkina, Yu. N. Kulchin, Yu. A. Shchipunov, and I. V. Postnova  »View Author Affiliations


Optics Express, Vol. 22, Issue 2, pp. 2105-2110 (2014)
http://dx.doi.org/10.1364/OE.22.002105


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Abstract

In this paper we study the laser-induced modification of optical properties of nanocomposite based on cadmium sulphide quantum dots encapsulated into thiomalic acid shell which were embedded into a porous silica matrix. We found red shift of luminescence of the nanocomposite when exposed to laser radiation at λ = 405 nm. Using pump-probe method and Small-Angle X-ray Scattering technique it was found that laser radiation at λ = 405 nm also increases the absorption coefficient of the nanocomposite in 15 times due to agglomeration of quantum dots. The modification of absorption properties is fully reversible.

© 2014 Optical Society of America

OCIS Codes
(230.1150) Optical devices : All-optical devices
(230.5590) Optical devices : Quantum-well, -wire and -dot devices

ToC Category:
Spectroscopy

History
Original Manuscript: October 28, 2013
Revised Manuscript: December 25, 2013
Manuscript Accepted: January 14, 2014
Published: January 24, 2014

Virtual Issues
Vol. 9, Iss. 3 Virtual Journal for Biomedical Optics

Citation
S. S. Voznesenskiy, A. A. Sergeev, A. N. Galkina, Yu. N. Kulchin, Yu. A. Shchipunov, and I. V. Postnova, "Laser-induced photodynamic effects at silica nanocomposite based on cadmium sulphide quantum dots," Opt. Express 22, 2105-2110 (2014)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-22-2-2105


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