The Impact Of Ultrashort Decoherence Time On Quantum Coherence In Hybrid Quantum Dotmetallic Nanoparticle Systems | 11570
Journal of Material Sciences & Engineering
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The possibility of maintaining of quantum coherence of semiconductor quantum dots is one of the most important desires
in quantum optics, quantum devices, and particularly quantum computers. The existing attempts include using very low
temperatures to suppress the large polarization dephasing rates of the quantum dots and/or using ultrashort optical pulses. In
this contribution, we discuss the prospect of generation and preservation of quantum coherence effects in hybrid quantum dot-
metallic nanoparticle systems at elevated temperatures. It will be shown, via theoretical means, that even when the decoherence
times of the quantum dots are of the order of several hundreds of femtoseconds, as observed at room temperature, the molecular
resonances of such hybrid systems formed via coherent exciton-plasmon coupling can remain quite distinct and observable. The
quantum optical properties of the quantum dots in such hybrid systems, including the possibility of generation of ultra-narrow
gain features, will be discussed.
Seyed Sadeghi received his Ph.D. in Physics from the University of British Columbia in Canada. He held NSERC postdoctoral fellowship before
joining industry. In 2007, he joined University of Alabama in Huntsville. His fields of research include nanomaterials, quantum sensors based on
hybrid nanoparticle systems, coherent optics of nanoparticles, and photophysics and photochemistry of colloidal quantum dots. Currently, he is
serving as an editorial board member of Journal of Nanomedicine and Nanotechnology and Dataset Papers in Optics.
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