A quantum light-emitting diode for the standard telecom window around 1550 nm (Conference Presentation)

Tina Muller; Joanna Skiba-Szymanska; Andrey Krysa; Jan Huwer; Martin Felle; Matthew Anderson; Mark Stevenson; Jon Heffernan; David Ritchie; Andrew Shields

doi:10.1117/12.2508563

4 March 2019 A quantum light-emitting diode for the standard telecom window around 1550 nm (Conference Presentation)

Tina Muller, Joanna Skiba-Szymanska, Andrey Krysa, Jan Huwer, Martin Felle, Matthew Anderson, Mark Stevenson, Jon Heffernan, David Ritchie, Andrew Shields

Author Affiliations +

Proceedings Volume 10933, Advances in Photonics of Quantum Computing, Memory, and Communication XII; 109330H (2019) https://doi.org/10.1117/12.2508563
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

Quantum communication networks are formed of secure links, where information can be transmitted with security guaranteed by the quantum nature of light. An essential building block of such a network is a source of single photons and entangled photon pairs, compatible with the low-loss fibre telecom window around 1550 nm. Previous work based on semiconductor quantum dots (QDs), colour centres in diamond and single atoms has been limited by emission wavelengths unsuitable for long distance applications. Efforts have been made to use standard gallium arsenide based QDs by extending their operating wavelength range, however, electrically driven quantum light emission from quantum dots in this telecommunication window has not yet been demonstrated. In this work, indium phosphide based QD devices have been developed to address this problem. The industry favoured growth method, metalorganic vapour phase epitaxy (MOVPE), has been used to create droplet QDs with low fine structure splitting (FSS). This growth scheme allows us to produce the first optoelectronic devices for single and entangled photon emission in the 1550 nm telecom window. We show single-photon emission with multi-photon events suppressed to 0.11±0.02. Furthermore, we obtain entangled light from the biexciton cascade with a maximum fidelity of 0.87± 0.04 which is sufficient for error correction protocols. We also show extended device operating temperature up to 93 K, allowing operation with liquid nitrogen or simple closed-cycle coolers. Our device can be directly integrated with existing long distance quantum communication, cryptography and quantum relay systems providing a new platform for developing quantum networks.

Conference Presentation

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Tina Muller, Joanna Skiba-Szymanska, Andrey Krysa, Jan Huwer, Martin Felle, Matthew Anderson, Mark Stevenson, Jon Heffernan, David Ritchie, and Andrew Shields "A quantum light-emitting diode for the standard telecom window around 1550 nm (Conference Presentation)", Proc. SPIE 10933, Advances in Photonics of Quantum Computing, Memory, and Communication XII, 109330H (4 March 2019); https://doi.org/10.1117/12.2508563

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KEYWORDS

Light emitting diodes

Quantum communications

Quantum dots

Information security

Networks

Telecommunications

Network security

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