A source of entangled photons based on a cavity-enhanced and strain-tuned GaAs quantum dot

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F24%3A73625462" target="_blank" >RIV/61989592:15310/24:73625462 - isvavai.cz</a>

Výsledek na webu

<a href="https://elight.springeropen.com/articles/10.1186/s43593-024-00072-8" target="_blank" >https://elight.springeropen.com/articles/10.1186/s43593-024-00072-8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1186/s43593-024-00072-8" target="_blank" >10.1186/s43593-024-00072-8</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A source of entangled photons based on a cavity-enhanced and strain-tuned GaAs quantum dot

Popis výsledku v původním jazyce

A quantum-light source that delivers photons with a high brightness and a high degree of entanglement is fundamental for the development of efficient entanglement-based quantum-key distribution systems. Among all possible candidates, epitaxial quantum dots are currently emerging as one of the brightest sources of highly entangled photons. However, the optimization of both brightness and entanglement currently requires different technologies that are difficult to combine in a scalable manner. In this work, we overcome this challenge by developing a novel device consisting of a quantum dot embedded in a circular Bragg resonator, in turn, integrated onto a micromachined piezoelectric actuator. The resonator engineers the light-matter interaction to empower extraction efficiencies up to 0.69(4). Simultaneously, the actuator manipulates strain fields that tune the quantum dot for the generation of entangled photons with corrected fidelities to a maximally entangled state up to 0.96(1). This hybrid technology has the potential to overcome the limitations of the key rates that plague QD-based entangled sources for entanglement-based quantum key distribution and entanglement-based quantum networks.

Název v anglickém jazyce

A source of entangled photons based on a cavity-enhanced and strain-tuned GaAs quantum dot

Popis výsledku anglicky

A quantum-light source that delivers photons with a high brightness and a high degree of entanglement is fundamental for the development of efficient entanglement-based quantum-key distribution systems. Among all possible candidates, epitaxial quantum dots are currently emerging as one of the brightest sources of highly entangled photons. However, the optimization of both brightness and entanglement currently requires different technologies that are difficult to combine in a scalable manner. In this work, we overcome this challenge by developing a novel device consisting of a quantum dot embedded in a circular Bragg resonator, in turn, integrated onto a micromachined piezoelectric actuator. The resonator engineers the light-matter interaction to empower extraction efficiencies up to 0.69(4). Simultaneously, the actuator manipulates strain fields that tune the quantum dot for the generation of entangled photons with corrected fidelities to a maximally entangled state up to 0.96(1). This hybrid technology has the potential to overcome the limitations of the key rates that plague QD-based entangled sources for entanglement-based quantum key distribution and entanglement-based quantum networks.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

<a href="/cs/project/GA21-18545S" target="_blank" >GA21-18545S: Kvantová metrologie založená na fotonických sítích</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

eLight

ISSN

2097-1710

e-ISSN

2662-8643

Svazek periodika

4

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

"13-1"-"13-13"

Kód UT WoS článku

001275570700001

EID výsledku v databázi Scopus

2-s2.0-85199348135