TY - JOUR
T1 - Monolayer-Based Single-Photon Source in a Liquid-Helium-Free Open Cavity Featuring 65% Brightness and Quantum Coherence
AU - Drawer, Jens Christian
AU - Mitryakhin, Victor Nikolaevich
AU - Shan, Hangyong
AU - Stephan, Sven
AU - Gittinger, Moritz
AU - Lackner, Lukas
AU - Han, Bo
AU - Leibeling, Gilbert
AU - Eilenberger, Falk
AU - Banerjee, Rounak
AU - Tongay, Sefaattin
AU - Watanabe, Kenji
AU - Taniguchi, Takashi
AU - Lienau, Christoph
AU - Silies, Martin
AU - Anton-Solanas, Carlos
AU - Esmann, Martin
AU - Schneider, Christian
N1 - Publisher Copyright:
© 2023 The Authors. Published by American Chemical Society.
PY - 2023/9/27
Y1 - 2023/9/27
N2 - Solid-state single-photon sources are central building blocks in quantum information processing. Atomically thin crystals have emerged as sources of nonclassical light; however, they perform below the state-of-the-art devices based on volume crystals. Here, we implement a bright single-photon source based on an atomically thin sheet of WSe2 coupled to a tunable optical cavity in a liquid-helium-free cryostat without the further need for active stabilization. Its performance is characterized by high single-photon purity (g(2)(0) = 4.7 ± 0.7%) and record-high, first-lens brightness of linearly polarized photons of 65 ± 4%, representing a decisive step toward real-world quantum applications. The high performance of our devices allows us to observe two-photon interference in a Hong-Ou-Mandel experiment with 2% visibility limited by the emitter coherence time and setup resolution. Our results thus demonstrate that the combination of the unique properties of two-dimensional materials and versatile open cavities emerges as an inspiring avenue for novel quantum optoelectronic devices.
AB - Solid-state single-photon sources are central building blocks in quantum information processing. Atomically thin crystals have emerged as sources of nonclassical light; however, they perform below the state-of-the-art devices based on volume crystals. Here, we implement a bright single-photon source based on an atomically thin sheet of WSe2 coupled to a tunable optical cavity in a liquid-helium-free cryostat without the further need for active stabilization. Its performance is characterized by high single-photon purity (g(2)(0) = 4.7 ± 0.7%) and record-high, first-lens brightness of linearly polarized photons of 65 ± 4%, representing a decisive step toward real-world quantum applications. The high performance of our devices allows us to observe two-photon interference in a Hong-Ou-Mandel experiment with 2% visibility limited by the emitter coherence time and setup resolution. Our results thus demonstrate that the combination of the unique properties of two-dimensional materials and versatile open cavities emerges as an inspiring avenue for novel quantum optoelectronic devices.
KW - open microcavity
KW - quantum dots
KW - single-photon source
KW - two-dimensional materials
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U2 - 10.1021/acs.nanolett.3c02584
DO - 10.1021/acs.nanolett.3c02584
M3 - Article
C2 - 37688586
AN - SCOPUS:85172711809
SN - 1530-6984
VL - 23
SP - 8683
EP - 8689
JO - Nano Letters
JF - Nano Letters
IS - 18
ER -