TY - JOUR
A2 - Sun, Fengqiang
AU - Augustine, Anju K.
AU - Mathew, S.
AU - Radhakrishnan, P.
AU - Nampoori, V. P. N.
AU - Kailasnath, M.
PY - 2014
DA - 2014/11/26
TI - Size Dependent Optical Nonlinearity and Optical Limiting Properties of Water Soluble CdSe Quantum Dots
SP - 623742
VL - 2014
AB - We present third-order optical nonlinear absorption in CdSe quantum dots (QDs) with particle sizes in the range of 4.16–5.25 nm which has been evaluated by the Z-scan technique. At an excitation irradiance of 0.54 GW/cm2 the CdSe QDs exhibit reverse saturation indicating a clear nonlinear behavior. Nonlinearity increases with particle size in CdSe QDs within the range of our investigations which in turn depends on the optical band gap. The optical limiting threshold of the QDs varies from 0.35 GW/cm2 to 0.57 GW/cm2 which makes CdSe QDs a promising candidate for reverse-saturable absorption based devices at high laser intensities such as optical limiters.
SN - 2356-749X
UR - https://doi.org/10.1155/2014/623742
DO - 10.1155/2014/623742
JF - Journal of Nanoscience
PB - Hindawi Publishing Corporation
KW -
ER -