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SUMMARY:A quantum light-emitting diode for the standard telecom window aro
 und 1\,550 nm   - Ginny Shooter\,  Cavendish Laboratory\, University of 
 Cambridge\, UK
DTSTART:20180606T130000Z
DTEND:20180606T140000Z
UID:TALK106684@talks.cam.ac.uk
CONTACT:Dr Kaveh Delfanazari
DESCRIPTION:A source of single photons or entangled photon pairs is necess
 ary for applications such as quantum cryptography and quantum computation 
 protocols. Requirements of the source include that it operates at 1550nm t
 o be compatible with optical fibers\, has sub-Poissonian statistics to avo
 id photon splitting attacks\, and is electrically driven so as to not requ
 ire bulky or complex optics.\n\nSemiconductor quantum dot devices are prom
 ising candidates for such a source\, as they have been shown to have sub-P
 oissonian and can be electrically driven [1]. InAs/GaAs quantum dots emit 
 at around 900nm\, though longer emission wavelengths can be achieved by us
 ing large quantum dots and strain reducing layers [2]. InP based quantum d
 ot lasers reach 1550nm\, so InP based devices with InAs/InP quantum dot de
 vices are being developed.\n\nIn this talk I will present a paper by Müll
 er et al on the realisation of a quantum LED operating at around 1550nm [3
 ].\n\n \n\n[1] Yuan\, Z.\, Kardynal\, B.E.\, Stevenson\, R.M.\, Shields\, 
 A.J.\, Lobo\, C.J.\, Cooper\, K.\, Beattie\, N.S.\, Ritchie\, D.A. and Pep
 per\, M.\, 2002. Electrically driven single-photon source. science\, 295(5
 552)\, pp.102-105.\n\n[2] Zinoni\, C.\, Alloing\, B.\, Monat\, C.\, Zwille
 r\, V.\, Li\, L.H.\, Fiore\, A.\, Lunghi\, L.\, Gerardino\, A.\, De Riedma
 tten\, H.\, Zbinden\, H. and Gisin\, N.\, 2006. Time-resolved and antibunc
 hing experiments on single quantum dots at 1300 nm. Applied Physics Letter
 s\, 88(13)\, p.131102.\n\n[3] Müller\, T.\, Skiba-Szymanska\, J.\, Krysa\
 , A.B.\, Huwer\, J.\, Felle\, M.\, Anderson\, M.\, Stevenson\, R.M.\, Heff
 ernan\, J.\, Ritchie\, D.A. and Shields\, A.J.\, 2018. A quantum light-emi
 tting diode for the standard telecom window around 1\,550 nm. Nature commu
 nications\, 9(1)\, p.862.\n
LOCATION:Small Lecture Theatre (Bragg Building)\, Cavendish Laboratory
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