The value of two photon absorption coefficients (β) of core-shell QDs extracted as80cm/GW, and it shows excellent benchmark for the optical limiting onset of 2.5GW/cm2 with the low limiting differential transmittance of 0.10, that is an order of magnitude better than graphene based materials. The optical nonlinearity of the core-shell quantum dot studied by using the Z-scan technique with 120 fs pulses at the wavelengths of 800 nm. We have carried out femtosecond transient absorption studies of the CdSe/ZnS core-shell quantum dot by irradiation with 400 nm laser light, monitoring the transients in the visible region. Pump-probe and time-resolved measurements revealed the drop of trapping at CdSe surface due to the presence of the ZnS shell, which makes more efficient photoluminescence. Here we present a comprehensive study of ultrafast excitation dynamics and nonlinear optical absorption of CdSe/ZnS core shell quantum dot with the help of ultrafast spectroscopy. V.Ĭore-shell quantum dot are imperative for carrier (electron and holes) confinement in core/shell, which provides a stage to explore the linear and nonlinear optical phenomena at the nanoscalelimit. Yadav, Rajesh Kumar Sharma, Rituraj Mondal, Anirban Adarsh, K. Ultrafast light matter interaction in CdSe/ZnS core-shell quantum dots The effect of Aluminium concentration, shell thickness and size of the core shell Quantum Dot on the Diamagnetic Susceptibility of a donor in the Core Shell Quantum Dot is calculated in the effective mass approximation using the variational method. Merwyn Jasper D., E-mail: [Department of Physics, Saveetha School of Engineering, Saveetha University, Thandalam, Chennai – 602105 (India) [Department of Physics, Gandhigram Rural University, Gandhigram, Tamilnadu-624302 (India) Reuben, A. Shaik, Nagoor Babu [Department of Mechanical Engineering, Saveetha School of Engineering, Saveetha University, Thandalam, Chennai – 602105 (India) Kalpana, P. The diamagnetic susceptibility of a donor in a semiconductor core shell quantum dotĮnergy Technology Data Exchange (ETDEWEB)
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