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Stimulated Mie scattering in nanocrystals suspension
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DOI：10.1063/1.4730408.png)
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Abstract
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In this letter, we report the observation of backward stimulated Mie scattering in a suspension of CdSe/Cds/ZnS nanocrystals in chloroform, pump by 816-nm or 1064-nm nanosecond laser pulses. The observed stimulated scattering exhibits the features of no frequency-shift, low pump threshold requirement, and easy controllability. For average nanocrystals' size of similar to 5.5 nm and weight concentration of 4.5 mg/mL, the measured nonlinear reflectivity (energy conversion efficiency from pump pulse to stimulated scattering pulse) could be up to 32%. This nanoparticles-based stimulated scattering effect can find special applications for self-adapted bioimaging, high-sensitivity sensors, lasing feedback elements, and optical ranging and lidar systems. (C) American Institute of Physics. [http://dx.doi.org/10.1063/1.4730408]
Keywords:
THERMAL RAYLEIGH SCATTERING
GOLD NANOPARTICLES
LIGHT-SCATTERING
ABSORPTION
SIZE
LIQUIDS
NANORODS
WAVES
SHAPE
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