The Journal of Physical Chemistry Letters has published the study Enhancement of Biexciton Emission Due to Long-Range Interaction of Single Quantum Dots and Gold Nanorods in a Thin-Film Hybrid Nanostructure by Victor Krivenkov, Simon Goncharov, Pavel Samokhvalov, Ana Sánchez-Iglesias, Marek Grzelczak, Igor Nabiev, and Yury Rakovich, of the cluster of laboratories of Hybrid Photonic Nanomaterials (LPNM) and Nano-Bioengineering (LNBE) of MEPhI and Western European research centers.
Editors of this journal consider the study’s scientific importance to be high enough for its graphical abstract to appear on the cover of this prestigious periodical.
The published study deals with an important current problem of nanophotonics, modification of the intensity of quantum dot luminescence by plasmonic nanoparticles. Photoluminescent semiconductor nanocrystals, known as quantum dots, can simultaneously generate two excitons upon absorption of radiation and then almost simultaneously emit two photons, which makes their luminescence brighter and may be useful for various quantum technological applications.
The authors have developed a thin-film composite structure with a controlled distance between quantum dots and plasmonic particles (golden nanorods) and showed that variation of this distance causes a change in the ratio between the intensities of nonradiative and radiative recombinations of excitons. The researchers explain this by enhancement of the Purcell effect (which increases the probability of radiative recombination) with increasing distance between the exciton and plasmon. Apart from the basic scientific importance, the results of the study have considerable practical implications for materials science, quantum optics, quantum technologies, and biosensing.
The Journal of Physical Chemistry Letters is published by the American Chemical Society (ACS) Publications and is one of the world’s most prestigious journals in materials science, as well as nanoscience and nanotechnology (www.scimagojr.com/journalsearch.php?q=19600166212&tip=sid&clean=0).
This top-rated international journal with an impact factor of 8.7 publishes only the studies that make a contribution to science owing to a significant scientific advance and/or physical insight.
The paper: www.ncbi.nlm.nih.gov/pubmed/30616347
Prof. Yury P. Rakovich, head of the Laboratory of Hybrid Photonic Nanomaterials (LPNM) (YPRakovich@mephi.ru)
Maria G. Korenkova, director of external relations (MGKorenkova@mephi.ru)
Laboratory of Nano-Bioengineering and Laboratory of Hybrid Photonic Nanomaterials
National Research Nuclear University MEPhI, 31 Kashirskoe shosse, 115409 Moscow, Russian Federation