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Sökning: id:"swepub:oai:DiVA.org:kth-208820" > Bright nanoscale so...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00003418naa a2200409 4500
001oai:DiVA.org:kth-208820
003SwePub
008170613s2017 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2088202 URI
0247 a https://doi.org/10.1038/s41598-017-01509-62 DOI
040 a (SwePub)kth
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Jöns, Klaus D.u KTH,Kvantnanofotonik,Delft University of Technology, Netherlands4 aut0 (Swepub:kth)u1l3aevw
2451 0a Bright nanoscale source of deterministic entangled photon pairs violating Bell's inequality
264 c 2017-05-10
264 1b Nature Publishing Group,c 2017
338 a print2 rdacarrier
500 a QC 20170613
520 a Global, secure quantum channels will require efficient distribution of entangled photons. Long distance, low-loss interconnects can only be realized using photons as quantum information carriers. However, a quantum light source combining both high qubit fidelity and on-demand bright emission has proven elusive. Here, we show a bright photonic nanostructure generating polarization-entangled photon pairs that strongly violates Bell's inequality. A highly symmetric InAsP quantum dot generating entangled photons is encapsulated in a tapered nanowire waveguide to ensure directional emission and efficient light extraction. We collect similar to 200 kHz entangled photon pairs at the first lens under 80 MHz pulsed excitation, which is a 20 times enhancement as compared to a bare quantum dot without a photonic nanostructure. The performed Bell test using the Clauser-Horne-Shimony-Holt inequality reveals a clear violation (S-CHSH > 2) by up to 9.3 standard deviations. By using a novel quasi-resonant excitation scheme at the wurtzite InP nanowire resonance to reduce multi-photon emission, the entanglement fidelity (F = 0.817 +/- 0.002) is further enhanced without temporal post-selection, allowing for the violation of Bell's inequality in the rectilinear-circular basis by 25 standard deviations. Our results on nanowire-based quantum light sources highlight their potential application in secure data communication utilizing measurement-device-independent quantum key distribution and quantum repeater protocols.
650 7a NATURVETENSKAPx Fysikx Annan fysik0 (SwePub)103992 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Other Physics Topics0 (SwePub)103992 hsv//eng
7001 a Schweickert, Lucasu KTH,Kvantnanofotonik,Delft University of Technology, Netherlands4 aut0 (Swepub:kth)u1vidf8j
7001 a Versteegh, Marijn A. M.u KTH,Kvantnanofotonik,Delft University of Technology, Netherlands4 aut0 (Swepub:kth)u1dzuo8r
7001 a Dalacu, Dan4 aut
7001 a Poole, Philip J.4 aut
7001 a Gulinatti, Angelo4 aut
7001 a Giudice, Andrea4 aut
7001 a Zwiller, Valu KTH,Kvantnanofotonik,Delft University of Technology, Netherlands4 aut0 (Swepub:kth)u1ummq2v
7001 a Reimer, Michael E.4 aut
7102 a KTHb Kvantnanofotonik4 org
7730 t Scientific Reportsd : Nature Publishing Groupg 7:1q 7:1x 2045-2322
8564 u https://www.nature.com/articles/s41598-017-01509-6.pdf
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-208820
8564 8u https://doi.org/10.1038/s41598-017-01509-6

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