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Strain-Controlled Q...
Strain-Controlled Quantum Dot Fine Structure for Entangled Photon Generation at 1550 nm
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- Lettner, Thomas (author)
- KTH,Kvant- och biofotonik
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- Gyger, Samuel (author)
- KTH,Kvant- och biofotonik
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- Zeuner, Katharina (author)
- KTH,Kvant- och biofotonik
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- Schweickert, Lucas (author)
- KTH,Kvant- och biofotonik
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- Steinhauer, Stephan (author)
- KTH,Kvant- och biofotonik
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- Reuterskiöld-Hedlund, Carl (author)
- KTH,Integrerade komponenter och kretsar
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- Stroj, Sandra (author)
- Vorarlberg Univ Appl Sci, Res Ctr Microtechnol, A-6850 Dornbirn, Austria.
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- Rastelli, Armando (author)
- Johannes Kepler Univ Linz, Inst Semicond & Solid State Phys, A-4040 Linz, Austria.
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- Hammar, Mattias, 1961- (author)
- KTH,Integrerade komponenter och kretsar
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- Trotta, Rinaldo (author)
- Sapienza Univ Rome, Dept Phys, I-00185 Rome, Italy.
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- Jöns, Klaus D. (author)
- KTH,Kvant- och biofotonik,Paderborn Univ, Inst Photon Quantum Syst PhoQS, Ctr Optoelect & Photon Paderborn CeOPP, D-33098 Paderborn, Germany.;Paderborn Univ, Dept Phys, D-33098 Paderborn, Germany.
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- Zwiller, Val (author)
- KTH,Kvant- och biofotonik
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(creator_code:org_t)
- 2021-12-13
- 2021
- English.
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In: Nano Letters. - : American Chemical Society (ACS). - 1530-6984 .- 1530-6992. ; 21:24, s. 10501-10506
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https://doi.org/10.1...
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Abstract
Subject headings
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- Entangled photon generation at 1550 nm in the telecom C-band is of critical importance as it enables the realization of quantum communication protocols over long distance using deployed telecommunication infrastructure. InAs epitaxial quantum dots have recently enabled on-demand generation of entangled photons in this wavelength range. However, time-dependent state evolution, caused by the fine-structure splitting, currently limits the fidelity to a specific entangled state. Here, we show fine-structure suppression for InAs quantum dots using micromachined piezoelectric actuators and demonstrate generation of highly entangled photons at 1550 nm. At the lowest fine-structure setting, we obtain a maximum fidelity of 90.0 +/- 2.7% (concurrence of 87.5 +/- 3.1%). The concurrence remains high also for moderate (weak) temporal filtering, with values close to 80% (50%), corresponding to 30% (80%) of collected photons, respectively. The presented fine-structure control opens the way for exploiting entangled photons from quantum dots in fiber-based quantum communication protocols.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- semiconductor quantum dots
- entangled photons
- strain tuning
- fine-structure splitting
- quantum state tomography
- telecom wavelengths
- single-photon source
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Lettner, Thomas
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Gyger, Samuel
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Zeuner, Katharin ...
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Schweickert, Luc ...
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Steinhauer, Step ...
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Reuterskiöld-Hed ...
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Stroj, Sandra
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Rastelli, Armand ...
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Hammar, Mattias, ...
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Trotta, Rinaldo
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Jöns, Klaus D.
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Zwiller, Val
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
- Articles in the publication
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Nano Letters
- By the university
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Royal Institute of Technology