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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 19 — Sep. 17, 2007
  • pp: 12258–12263

Size dependent multiphoton absorption and refraction of CdSe nanoparticles

N. Venkatram, R. Sathyavathi, and D. Narayana Rao  »View Author Affiliations

Optics Express, Vol. 15, Issue 19, pp. 12258-12263 (2007)

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We report a systematic investigation on nonlinear optical properties of CdSe nanoparticles that are smaller as well as larger than the Bohr radius. Multiphoton absorption and nonlinear refraction properties of CdSe nanoparticles observed with 800nm wavelength and 110femtosecond Ti:Sapphire laser are presented. These nonlinear optical studies were undertaken by performing open and closed aperture Z-scan measurements. The four different sizes of CdSe nanoparticles investigated are 5nm, 10nm, 25nm and 400nm. Both the quantum dots 5nm, 10nm sizes (taking the literature value of 10.6nm as the Bohr exciton diameter) show four photon absorption (4PA), while the 25nm and 400nm show the three photon absorption (3PA) properties. All four sizes of CdSe nanoparticles show the positive nonlinear refraction (n2).

© 2007 Optical Society of America

OCIS Codes
(190.3970) Nonlinear optics : Microparticle nonlinear optics
(190.4180) Nonlinear optics : Multiphoton processes
(190.4400) Nonlinear optics : Nonlinear optics, materials
(190.5970) Nonlinear optics : Semiconductor nonlinear optics including MQW

ToC Category:
Nonlinear Optics

Original Manuscript: June 11, 2007
Revised Manuscript: August 30, 2007
Manuscript Accepted: September 1, 2007
Published: September 12, 2007

Virtual Issues
Vol. 2, Iss. 10 Virtual Journal for Biomedical Optics

N. Venkatram, R. Sathyavathi, and D. N. Rao, "Size dependent multiphoton absorption and refraction of CdSe nanoparticles," Opt. Express 15, 12258-12263 (2007)

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