Two photon absorption in Mn2+-doped ZnSe quantum dots

More, Deepak ; Rajesh, Ch. ; Lad, Amit D. ; Kumar, G. Ravindra ; Mahamuni, Shailaja (2010) Two photon absorption in Mn2+-doped ZnSe quantum dots Optics Communications, 283 (10). pp. 2150-2154. ISSN 0030-4018

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The nonresonant third order nonlinear optical properties of three different sized Mn2+-doped ZnSe quantum dots (QDs) are investigated. The nonlinear absorption is measured at 532 nm using 35 picosecond laser pulses in an open-aperture Z-scan setup. Two photon absorption (2PA) cross-section in ZnSe QDs is found to be three orders of magnitude higher than its bulk value. These nanostructures show size dependent nonlinear absorption coefficients. It is found that the 2PA further enhances with decrease in size of the QD and is twice that of its undoped counterpart due to change in the local electric field.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Nonlinear Optical Materials; II-VI Semiconductors; Photoluminescence
ID Code:29698
Deposited On:23 Dec 2010 05:33
Last Modified:17 May 2016 12:30

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