Fig 2 - uploaded by Ujjwal Ghanta
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Peak emission intensity variation with incident laser power. The peak intensity varies super linearly with the incident power for both the peaks. The high intense peak is more sensitive to incident power. The solid lines are power –law fitting. A clear threshold is observed near 1.92 W/cm 2 .
Source publication
In this work we have studied the photoluminescence (PL) properties of colloidal suspension of silicon quantum dots (QDs) surrounded by silicon oxide with 3.08 eV continuous wave (CW) laser and the effect of excitation power. The oxide coated silicon QDs shows strong visible PL at room temperature. The emission spectrum consists of two consecutive p...
Context in source publication
Context 1
... inset represents the de-convolution of the spectrum for excitation intensity 2.72 W/cm 2 and the numbers represents the peak positions in nm. Figure 2 shows the power dependence of the PL emission peak intensities in a log-log plot. The solid straight line represents the linear fit of the data points. ...
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