{"quality_controlled":"1","title":"Bright single photon emitters with enhanced quantum efficiency in a two-dimensional semiconductor coupled with dielectric nano-antennas","status":"public","oa_version":"Published Version","oa":1,"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","date_created":"2021-10-31T23:01:30Z","publisher":"Springer Nature","scopus_import":"1","date_published":"2021-10-18T00:00:00Z","publication_status":"published","department":[{"_id":"BjHo"}],"abstract":[{"lang":"eng","text":"Single photon emitters in atomically-thin semiconductors can be deterministically positioned using strain induced by underlying nano-structures. Here, we couple monolayer WSe2 to high-refractive-index gallium phosphide dielectric nano-antennas providing both optical enhancement and monolayer deformation. For single photon emitters formed on such nano-antennas, we find very low (femto-Joule) saturation pulse energies and up to 104 times brighter photoluminescence than in WSe2 placed on low-refractive-index SiO2 pillars. We show that the key to these observations is the increase on average by a factor of 5 of the quantum efficiency of the emitters coupled to the nano-antennas. This further allows us to gain new insights into their photoluminescence dynamics, revealing the roles of the dark exciton reservoir and Auger processes. We also find that the coherence time of such emitters is limited by intrinsic dephasing processes. Our work establishes dielectric nano-antennas as a platform for high-efficiency quantum light generation in monolayer semiconductors."}],"type":"journal_article","file":[{"date_updated":"2021-11-03T11:31:24Z","success":1,"file_id":"10212","file_size":1434201,"date_created":"2021-11-03T11:31:24Z","checksum":"8580d128389860f732028c521cd5949e","relation":"main_file","content_type":"application/pdf","access_level":"open_access","creator":"cchlebak","file_name":"2021_NatComm_Sortino.pdf"}],"day":"18","article_processing_charge":"No","month":"10","date_updated":"2023-08-14T08:12:12Z","tmp":{"image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"acknowledgement":"L.S., P.G.Z., and A.I.T. thank the financial support of the European Graphene Flagship Project under grant agreements 881603 and EPSRC grant EP/S030751/1. L.S. and A.I.T. thank the European Union’s Horizon 2020 research and innovation programme under ITN Spin-NANO Marie Sklodowska-Curie grant agreement no. 676108. P.G.Z. and A.I.T. thank the European Union’s Horizon 2020 research and innovation programme under ITN 4PHOTON Marie Sklodowska-Curie grant agreement no. 721394. J.C., S.A.M., and R.S. acknowledge funding by EPSRC (EP/P033369 and EP/M013812). C.L.P., A.J.B., A.I.T., and A.M.F. acknowledge funding by EPSRC Programme Grant EP/N031776/1. S.A.M. acknowledges the Lee-Lucas Chair in Physics, the Solar Energies go Hybrid (SolTech) programme, and the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy - EXC 2089/1 - 390776260.","file_date_updated":"2021-11-03T11:31:24Z","isi":1,"ddc":["530"],"intvolume":"        12","volume":12,"year":"2021","citation":{"short":"L. Sortino, P.G. Zotev, C.L. Phillips, A.J. Brash, J. Cambiasso, E. Marensi, A.M. Fox, S.A. Maier, R. Sapienza, A.I. Tartakovskii, Nature Communications 12 (2021).","ama":"Sortino L, Zotev PG, Phillips CL, et al. Bright single photon emitters with enhanced quantum efficiency in a two-dimensional semiconductor coupled with dielectric nano-antennas. <i>Nature Communications</i>. 2021;12. doi:<a href=\"https://doi.org/10.1038/s41467-021-26262-3\">10.1038/s41467-021-26262-3</a>","chicago":"Sortino, Luca, Panaiot G. Zotev, Catherine L. Phillips, Alistair J. Brash, Javier Cambiasso, Elena Marensi, A. Mark Fox, Stefan A. Maier, Riccardo Sapienza, and Alexander I. Tartakovskii. “Bright Single Photon Emitters with Enhanced Quantum Efficiency in a Two-Dimensional Semiconductor Coupled with Dielectric Nano-Antennas.” <i>Nature Communications</i>. Springer Nature, 2021. <a href=\"https://doi.org/10.1038/s41467-021-26262-3\">https://doi.org/10.1038/s41467-021-26262-3</a>.","ista":"Sortino L, Zotev PG, Phillips CL, Brash AJ, Cambiasso J, Marensi E, Fox AM, Maier SA, Sapienza R, Tartakovskii AI. 2021. Bright single photon emitters with enhanced quantum efficiency in a two-dimensional semiconductor coupled with dielectric nano-antennas. Nature Communications. 12, 6063.","apa":"Sortino, L., Zotev, P. G., Phillips, C. L., Brash, A. J., Cambiasso, J., Marensi, E., … Tartakovskii, A. I. (2021). Bright single photon emitters with enhanced quantum efficiency in a two-dimensional semiconductor coupled with dielectric nano-antennas. <i>Nature Communications</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41467-021-26262-3\">https://doi.org/10.1038/s41467-021-26262-3</a>","ieee":"L. Sortino <i>et al.</i>, “Bright single photon emitters with enhanced quantum efficiency in a two-dimensional semiconductor coupled with dielectric nano-antennas,” <i>Nature Communications</i>, vol. 12. Springer Nature, 2021.","mla":"Sortino, Luca, et al. “Bright Single Photon Emitters with Enhanced Quantum Efficiency in a Two-Dimensional Semiconductor Coupled with Dielectric Nano-Antennas.” <i>Nature Communications</i>, vol. 12, 6063, Springer Nature, 2021, doi:<a href=\"https://doi.org/10.1038/s41467-021-26262-3\">10.1038/s41467-021-26262-3</a>."},"article_type":"original","article_number":"6063","_id":"10203","language":[{"iso":"eng"}],"author":[{"full_name":"Sortino, Luca","last_name":"Sortino","first_name":"Luca"},{"last_name":"Zotev","first_name":"Panaiot G.","full_name":"Zotev, Panaiot G."},{"full_name":"Phillips, Catherine L.","first_name":"Catherine L.","last_name":"Phillips"},{"first_name":"Alistair J.","last_name":"Brash","full_name":"Brash, Alistair J."},{"first_name":"Javier","last_name":"Cambiasso","full_name":"Cambiasso, Javier"},{"last_name":"Marensi","first_name":"Elena","id":"0BE7553A-1004-11EA-B805-18983DDC885E","full_name":"Marensi, Elena","orcid":"0000-0001-7173-4923"},{"last_name":"Fox","first_name":"A. Mark","full_name":"Fox, A. Mark"},{"last_name":"Maier","first_name":"Stefan A.","full_name":"Maier, Stefan A."},{"last_name":"Sapienza","first_name":"Riccardo","full_name":"Sapienza, Riccardo"},{"full_name":"Tartakovskii, Alexander I.","last_name":"Tartakovskii","first_name":"Alexander I."}],"has_accepted_license":"1","publication":"Nature Communications","doi":"10.1038/s41467-021-26262-3","external_id":{"arxiv":["2103.16986"],"isi":["000708601800015"]},"publication_identifier":{"eissn":["2041-1723"]}}