We investigate the degree of indistinguishability of cascaded photons emitted from a three-level quantum ladder system; in our case the biexciton-exciton cascade of semiconductor quantum dots. For the three-level quantum ladder system we theoretically demonstrate that the indistinguishability is inherently limited for both emitted photons and determined by the ratio of the lifetimes of the excited and intermediate states. We experimentally confirm this finding by comparing the quantum interference visibility of noncascaded emission and cascaded emission from the same semiconductor quantum dot. Quantum optical simulations produce very good agreement with the measurements and allow us to explore a large parameter space. Based on our model, we propose photonic structures to optimize the lifetime ratio and overcome the limited indistinguishability of cascaded photon emission from a three-level quantum ladder system.

Crux of Using the Cascaded Emission of a Three-Level Quantum Ladder System to Generate Indistinguishable Photons / Schöll, Eva; Schweickert, Lucas; Hanschke, Lukas; Zeuner, Katharina D.; Sbresny, Friedrich; Lettner, Thomas; Trivedi, Rahul; Reindl, Marcus; Covre da Silva, Saimon Filipe; Trotta, Rinaldo; Finley, Jonathan J.; Vučković, Jelena; Müller, Kai; Rastelli, Armando; Zwiller, Val; Jöns, Klaus D.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 125:23(2020). [10.1103/PhysRevLett.125.233605]

Crux of Using the Cascaded Emission of a Three-Level Quantum Ladder System to Generate Indistinguishable Photons

Trotta, Rinaldo;
2020

Abstract

We investigate the degree of indistinguishability of cascaded photons emitted from a three-level quantum ladder system; in our case the biexciton-exciton cascade of semiconductor quantum dots. For the three-level quantum ladder system we theoretically demonstrate that the indistinguishability is inherently limited for both emitted photons and determined by the ratio of the lifetimes of the excited and intermediate states. We experimentally confirm this finding by comparing the quantum interference visibility of noncascaded emission and cascaded emission from the same semiconductor quantum dot. Quantum optical simulations produce very good agreement with the measurements and allow us to explore a large parameter space. Based on our model, we propose photonic structures to optimize the lifetime ratio and overcome the limited indistinguishability of cascaded photon emission from a three-level quantum ladder system.
2020
quantum dot
01 Pubblicazione su rivista::01a Articolo in rivista
Crux of Using the Cascaded Emission of a Three-Level Quantum Ladder System to Generate Indistinguishable Photons / Schöll, Eva; Schweickert, Lucas; Hanschke, Lukas; Zeuner, Katharina D.; Sbresny, Friedrich; Lettner, Thomas; Trivedi, Rahul; Reindl, Marcus; Covre da Silva, Saimon Filipe; Trotta, Rinaldo; Finley, Jonathan J.; Vučković, Jelena; Müller, Kai; Rastelli, Armando; Zwiller, Val; Jöns, Klaus D.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 125:23(2020). [10.1103/PhysRevLett.125.233605]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1533519
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