Pub Date : 2023-09-28DOI: 10.1364/opticaq.1.000006
Alexey Vylegzhanin, Dylan J. Brown, Aswathy Raj, Danil F. Kornovan, Jesse L. Everett, Etienne Brion, Jacques Robert, Síle Nic Chormaic
Cold Rydberg atoms are a promising platform for quantum technologies, and combining them with optical waveguides has the potential to create robust quantum information devices. Here, we experimentally observe the excitation of cold rubidium atoms to a large range of Rydberg S and D states through interaction with the evanescent field of an optical nanofiber. We develop a theoretical model to account for experimental phenomena present such as the AC Stark shifts and the Casimir–Polder interaction. This work strengthens the knowledge of Rydberg atom interactions with optical nanofibers and is a critical step toward the implementation of all-fiber quantum networks and waveguide quantum electrodynamics (QED) systems using highly excited atoms.
{"title":"Excitation of <sup>87</sup>Rb Rydberg atoms to nS and nD states (n≤68) via an optical nanofiber","authors":"Alexey Vylegzhanin, Dylan J. Brown, Aswathy Raj, Danil F. Kornovan, Jesse L. Everett, Etienne Brion, Jacques Robert, Síle Nic Chormaic","doi":"10.1364/opticaq.1.000006","DOIUrl":"https://doi.org/10.1364/opticaq.1.000006","url":null,"abstract":"Cold Rydberg atoms are a promising platform for quantum technologies, and combining them with optical waveguides has the potential to create robust quantum information devices. Here, we experimentally observe the excitation of cold rubidium atoms to a large range of Rydberg S and D states through interaction with the evanescent field of an optical nanofiber. We develop a theoretical model to account for experimental phenomena present such as the AC Stark shifts and the Casimir–Polder interaction. This work strengthens the knowledge of Rydberg atom interactions with optical nanofibers and is a critical step toward the implementation of all-fiber quantum networks and waveguide quantum electrodynamics (QED) systems using highly excited atoms.","PeriodicalId":471592,"journal":{"name":"Optica Quantum","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135385230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alexey Vylegzhanin, Dylan J. Brown, Aswathy Raj, Danil F. Kornovan, Jesse L. Everett, Etienne Brion, Jacques Robert, Síle Nic Chormaic
Cold Rydberg atoms are a promising platform for quantum technologies, and combining them with optical waveguides has the potential to create robust quantum information devices. Here, we experimentally observe the excitation of cold rubidium atoms to a large range of Rydberg S and D states through interaction with the evanescent field of an optical nanofiber. We develop a theoretical model to account for experimental phenomena present such as the AC Stark shifts and the Casimir–Polder interaction. This work strengthens the knowledge of Rydberg atom interactions with optical nanofibers and is a critical step toward the implementation of all-fiber quantum networks and waveguide quantum electrodynamics (QED) systems using highly excited atoms.
{"title":"Excitation of <sup>87</sup>Rb Rydberg atoms to nS and nD states (n≤68) via an optical nanofiber","authors":"Alexey Vylegzhanin, Dylan J. Brown, Aswathy Raj, Danil F. Kornovan, Jesse L. Everett, Etienne Brion, Jacques Robert, Síle Nic Chormaic","doi":"10.1364/opticaq.498414","DOIUrl":"https://doi.org/10.1364/opticaq.498414","url":null,"abstract":"Cold Rydberg atoms are a promising platform for quantum technologies, and combining them with optical waveguides has the potential to create robust quantum information devices. Here, we experimentally observe the excitation of cold rubidium atoms to a large range of Rydberg S and D states through interaction with the evanescent field of an optical nanofiber. We develop a theoretical model to account for experimental phenomena present such as the AC Stark shifts and the Casimir–Polder interaction. This work strengthens the knowledge of Rydberg atom interactions with optical nanofibers and is a critical step toward the implementation of all-fiber quantum networks and waveguide quantum electrodynamics (QED) systems using highly excited atoms.","PeriodicalId":471592,"journal":{"name":"Optica Quantum","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135425589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
L. M. Hansen, L. Carosini, L. Jehle, F. Giorgino, R. Houvenaghel, M. Vyvlecka, J. C. Loredo, P. Walther
Temporal-to-spatial mode demultiplexing routes non-simultaneous events of the same spatial mode to distinct output trajectories. This technique has now been widely adopted, because it gives access to higher-number multi-photon states when exploiting solid-state quantum emitters. However, implementations so far have required an always-increasing number of active elements and are therefore rapidly facing resource constraints. Here, we propose and demonstrate a demultiplexing approach that uses only a single active element for routing to, in principle, an arbitrary number of outputs. We employ our device in combination with a high-efficiency single-photon source based on a quantum dot, and measure up to eight demultiplexed highly indistinguishable single photons. We discuss the practical limitations of our approach, and describe in which conditions it can be used to demultiplex, e.g., tens of outputs. Our scheme thus provides a path for the preparation of resource-efficient larger-scale multi-photon sources.
{"title":"Single-active-element demultiplexed multi-photon source","authors":"L. M. Hansen, L. Carosini, L. Jehle, F. Giorgino, R. Houvenaghel, M. Vyvlecka, J. C. Loredo, P. Walther","doi":"10.1364/opticaq.494643","DOIUrl":"https://doi.org/10.1364/opticaq.494643","url":null,"abstract":"Temporal-to-spatial mode demultiplexing routes non-simultaneous events of the same spatial mode to distinct output trajectories. This technique has now been widely adopted, because it gives access to higher-number multi-photon states when exploiting solid-state quantum emitters. However, implementations so far have required an always-increasing number of active elements and are therefore rapidly facing resource constraints. Here, we propose and demonstrate a demultiplexing approach that uses only a single active element for routing to, in principle, an arbitrary number of outputs. We employ our device in combination with a high-efficiency single-photon source based on a quantum dot, and measure up to eight demultiplexed highly indistinguishable single photons. We discuss the practical limitations of our approach, and describe in which conditions it can be used to demultiplex, e.g., tens of outputs. Our scheme thus provides a path for the preparation of resource-efficient larger-scale multi-photon sources.","PeriodicalId":471592,"journal":{"name":"Optica Quantum","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135425590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Dryazgov, Yu. Biriukov, I. Dyakonov, K. Taratorin, A. Korneev, M. Rakhlin, A. Galimov, G. Klimko, S. Sorokin, M. Kulagina, Yu. Zadiranov, A. Toropov, F. Bergmann, S. Straupe, S. Kulik
We report a design and implementation of a resource-efficient spatial demultiplexer which produces four indistinguishable photons with efficiency of 39.7% per channel. Our scheme is based on a free-space storage/delay line which accumulates four photons and releases them by a controlled polarization rotation using a single Pockels cell.
{"title":"Resource-efficient low-loss four-channel active demultiplexer for single photons","authors":"M. Dryazgov, Yu. Biriukov, I. Dyakonov, K. Taratorin, A. Korneev, M. Rakhlin, A. Galimov, G. Klimko, S. Sorokin, M. Kulagina, Yu. Zadiranov, A. Toropov, F. Bergmann, S. Straupe, S. Kulik","doi":"10.1364/opticaq.494449","DOIUrl":"https://doi.org/10.1364/opticaq.494449","url":null,"abstract":"We report a design and implementation of a resource-efficient spatial demultiplexer which produces four indistinguishable photons with efficiency of 39.7% per channel. Our scheme is based on a free-space storage/delay line which accumulates four photons and releases them by a controlled polarization rotation using a single Pockels cell.","PeriodicalId":471592,"journal":{"name":"Optica Quantum","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135425587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-28DOI: 10.1364/opticaq.1.000001
Lena M Hansen, Lorenzo Carosini, Lennart Jehle, Francesco Giorgino, Romane Houvenaghel, Michal Vyvlecka, Juan C Loredo, Philip Walther
Temporal-to-spatial mode demultiplexing routes non-simultaneous events of the same spatial mode to distinct output trajectories. This technique has now been widely adopted, because it gives access to higher-number multi-photon states when exploiting solid-state quantum emitters. However, implementations so far have required an always-increasing number of active elements and are therefore rapidly facing resource constraints. Here, we propose and demonstrate a demultiplexing approach that uses only a single active element for routing to, in principle, an arbitrary number of outputs. We employ our device in combination with a high-efficiency single-photon source based on a quantum dot, and measure up to eight demultiplexed highly indistinguishable single photons. We discuss the practical limitations of our approach, and describe in which conditions it can be used to demultiplex, e.g., tens of outputs. Our scheme thus provides a path for the preparation of resource-efficient larger-scale multi-photon sources.
{"title":"Single-active-element demultiplexed multi-photon source","authors":"Lena M Hansen, Lorenzo Carosini, Lennart Jehle, Francesco Giorgino, Romane Houvenaghel, Michal Vyvlecka, Juan C Loredo, Philip Walther","doi":"10.1364/opticaq.1.000001","DOIUrl":"https://doi.org/10.1364/opticaq.1.000001","url":null,"abstract":"Temporal-to-spatial mode demultiplexing routes non-simultaneous events of the same spatial mode to distinct output trajectories. This technique has now been widely adopted, because it gives access to higher-number multi-photon states when exploiting solid-state quantum emitters. However, implementations so far have required an always-increasing number of active elements and are therefore rapidly facing resource constraints. Here, we propose and demonstrate a demultiplexing approach that uses only a single active element for routing to, in principle, an arbitrary number of outputs. We employ our device in combination with a high-efficiency single-photon source based on a quantum dot, and measure up to eight demultiplexed highly indistinguishable single photons. We discuss the practical limitations of our approach, and describe in which conditions it can be used to demultiplex, e.g., tens of outputs. Our scheme thus provides a path for the preparation of resource-efficient larger-scale multi-photon sources.","PeriodicalId":471592,"journal":{"name":"Optica Quantum","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135343122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-28DOI: 10.1364/opticaq.1.000014
M. Dryazgov, Yu. Biriukov, I. Dyakonov, K. Taratorin, A. Korneev, M. Rakhlin, A. Galimov, G. Klimko, S. Sorokin, M. Kulagina, Yu. Zadiranov, A. Toropov, F. Bergmann, S. Straupe, S. Kulik
We report a design and implementation of a resource-efficient spatial demultiplexer which produces four indistinguishable photons with efficiency of 39.7% per channel. Our scheme is based on a free-space storage/delay line which accumulates four photons and releases them by a controlled polarization rotation using a single Pockels cell.
{"title":"Resource-efficient low-loss four-channel active demultiplexer for single photons","authors":"M. Dryazgov, Yu. Biriukov, I. Dyakonov, K. Taratorin, A. Korneev, M. Rakhlin, A. Galimov, G. Klimko, S. Sorokin, M. Kulagina, Yu. Zadiranov, A. Toropov, F. Bergmann, S. Straupe, S. Kulik","doi":"10.1364/opticaq.1.000014","DOIUrl":"https://doi.org/10.1364/opticaq.1.000014","url":null,"abstract":"We report a design and implementation of a resource-efficient spatial demultiplexer which produces four indistinguishable photons with efficiency of 39.7% per channel. Our scheme is based on a free-space storage/delay line which accumulates four photons and releases them by a controlled polarization rotation using a single Pockels cell.","PeriodicalId":471592,"journal":{"name":"Optica Quantum","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135385225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Masahiro Yabuno, Fumihiro China, H Terai, Shigehito Miki
Superconducting strip single-photon detectors offer excellent photon detection performance and are indispensable tools for cutting-edge optical science and technologies, including photonic quantum computation and quantum networks. Ultra-wide superconducting strips with widths of tens of micrometers are desirable to achieve high polarization-independent detection efficiency using a simple straight strip. However, biasing the ultra-wide strip with sufficient superconducting current to make it sensitive to infrared photons is challenging. The main difficulty is maldistribution of the superconducting current in the strip, which generates excessive intrinsic dark counts. Here, we present a novel superconducting wide strip photon detector (SWSPD) with a high critical current bank (HCCB) structure. This HCCB structure enables suppression of the intrinsic dark counts and sufficient superconducting current biasing of the wide strip. We have experimentally demonstrated a polarization-independent system detection efficiency of ~78% for 1550 nm wavelength photons and a system dark count rate of ~80 cps using a 20-${mu}$m-wide SWSPD with the HCCB structure. Additionally, fast jitter of 29.8 ps was achieved. The photolithographically manufacturable ultra-wide SWSPD with high efficiency, low dark count, and fast temporal resolution paves the way toward the development of large-scale optical quantum technologies, which will require enormous numbers of ultimate-performance single-photon detectors.
{"title":"Superconducting wide strip photon detector with high critical current bank structure","authors":"Masahiro Yabuno, Fumihiro China, H Terai, Shigehito Miki","doi":"10.1364/opticaq.497675","DOIUrl":"https://doi.org/10.1364/opticaq.497675","url":null,"abstract":"Superconducting strip single-photon detectors offer excellent photon detection performance and are indispensable tools for cutting-edge optical science and technologies, including photonic quantum computation and quantum networks. Ultra-wide superconducting strips with widths of tens of micrometers are desirable to achieve high polarization-independent detection efficiency using a simple straight strip. However, biasing the ultra-wide strip with sufficient superconducting current to make it sensitive to infrared photons is challenging. The main difficulty is maldistribution of the superconducting current in the strip, which generates excessive intrinsic dark counts. Here, we present a novel superconducting wide strip photon detector (SWSPD) with a high critical current bank (HCCB) structure. This HCCB structure enables suppression of the intrinsic dark counts and sufficient superconducting current biasing of the wide strip. We have experimentally demonstrated a polarization-independent system detection efficiency of ~78% for 1550 nm wavelength photons and a system dark count rate of ~80 cps using a 20-${mu}$m-wide SWSPD with the HCCB structure. Additionally, fast jitter of 29.8 ps was achieved. The photolithographically manufacturable ultra-wide SWSPD with high efficiency, low dark count, and fast temporal resolution paves the way toward the development of large-scale optical quantum technologies, which will require enormous numbers of ultimate-performance single-photon detectors.","PeriodicalId":471592,"journal":{"name":"Optica Quantum","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135786193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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