Zi-Qiang Cheng

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In this paper, we propose a new more efficient steganog-raphy technique that can be applied in Internet environment. The new efficient technique can hide from 1 to 8 bits secret data per pixel, and has no distortion if the number of colors does not exceed 128. The proposed scheme first divides the secret data into several parts based on the number of colors(More)
Colloidal semiconductor quantum dots have three-dimensional confined excitons with large optical oscillator strength and gain. The surface plasmons of metallic nanostructures offer an efficient tool to enhance exciton-exciton coupling and excitation energy transfer at appropriate geometric arrangement. Here, we report plasmon-mediated cooperative emissions(More)
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