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Reports Summarize Science Study Results from Institute of Semiconductors (Surface recombination and charged exciton in nanocrystal quantum dots on...

August 29, 2014



Reports Summarize Science Study Results from Institute of Semiconductors (Surface recombination and charged exciton in nanocrystal quantum dots on photonic crystals under two-photon excitation)

By a News Reporter-Staff News Editor at Science Letter -- Current study results on Science have been published. According to news reporting originating from Beijing, People's Republic of China, by NewsRx editors, the research stated, "In this study, the two-photon excited fluorescence spectra from cadmium selenide quantum dots (QDs) on a silicon nitride photonic crystal (PhC) membrane under femtosecond laser irradiation were investigated. These spectra can be fit to a tri-Gaussian function in which one component is negative in amplitude, and in which the Gaussian components with positive amplitude are assigned to exciton emission and charged-exciton emission and that with negative amplitude is assigned to absorption from surface recombination."

Our news editors obtained a quote from the research from the Institute of Semiconductors, "The photonic crystal enhance the charged-exciton emission and exciton emission and, at the same time, also the absorption from surface recombination. Both the charged-exciton emission and the surface recombination are related to Auger recombination; therefore, the photonic crystal controls both radiative recombination and non-radiative recombination."

According to the news editors, the research concluded: "The asymmetries of the two-photon excited fluorescence spectra are due to not only the location of the resonant guide mode of the PhC slab but also the enhancement of the absorption from surface recombination by PhC."

For more information on this research see: Surface recombination and charged exciton in nanocrystal quantum dots on photonic crystals under two-photon excitation. Scientific Reports, 2014;4():5039. (Nature Publishing Group - www.nature.com/; Scientific Reports - www.nature.com/srep/)

The news editors report that additional information may be obtained by contacting X. Xu, State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, People's Republic of China (see also Science).

Keywords for this news article include: Asia, Beijing, Science, Quantum Dots, Quantum Physics, People's Republic of China.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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