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  1. AU="Phillips, Catherine L"
  2. AU="Galindo-Riera, Natalia"
  3. AU="Daniel, Roy Thomas"
  4. AU="Hesselink, Matthijs K C"
  5. AU=Kwong Kenneth K
  6. AU="Quintero, Luis"
  7. AU=Johnson Benjamin W.

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  1. Article ; Online: Purcell-enhanced single photons at telecom wavelengths from a quantum dot in a photonic crystal cavity.

    Phillips, Catherine L / Brash, Alistair J / Godsland, Max / Martin, Nicholas J / Foster, Andrew / Tomlinson, Anna / Dost, René / Babazadeh, Nasser / Sala, Elisa M / Wilson, Luke / Heffernan, Jon / Skolnick, Maurice S / Fox, A Mark

    Scientific reports

    2024  Volume 14, Issue 1, Page(s) 4450

    Abstract: Quantum dots are promising candidates for telecom single photon sources due to their tunable emission across the different low-loss telecommunications bands, making them compatible with existing fiber networks. Their suitability for integration into ... ...

    Abstract Quantum dots are promising candidates for telecom single photon sources due to their tunable emission across the different low-loss telecommunications bands, making them compatible with existing fiber networks. Their suitability for integration into photonic structures allows for enhanced brightness through the Purcell effect, supporting efficient quantum communication technologies. Our work focuses on InAs/InP QDs created via droplet epitaxy MOVPE to operate within the telecoms C-band. We observe a short radiative lifetime of 340 ps, arising from a Purcell factor of 5, owing to integration of the QD within a low-mode-volume photonic crystal cavity. Through in-situ control of the sample temperature, we show both temperature tuning of the QD's emission wavelength and a preserved single photon emission purity at temperatures up to 25K. These findings suggest the viability of QD-based, cryogen-free C-band single photon sources, supporting applicability in quantum communication technologies.
    Language English
    Publishing date 2024-02-23
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-024-55024-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Bright single photon emitters with enhanced quantum efficiency in a two-dimensional semiconductor coupled with dielectric nano-antennas.

    Sortino, Luca / Zotev, Panaiot G / Phillips, Catherine L / Brash, Alistair J / Cambiasso, Javier / Marensi, Elena / Fox, A Mark / Maier, Stefan A / Sapienza, Riccardo / Tartakovskii, Alexander I

    Nature communications

    2021  Volume 12, Issue 1, Page(s) 6063

    Abstract: Single photon emitters in atomically-thin semiconductors can be deterministically positioned using strain induced by underlying nano-structures. Here, we couple monolayer ... ...

    Abstract Single photon emitters in atomically-thin semiconductors can be deterministically positioned using strain induced by underlying nano-structures. Here, we couple monolayer WSe
    Language English
    Publishing date 2021-10-18
    Publishing country England
    Document type Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-021-26262-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Photon Statistics of Filtered Resonance Fluorescence.

    Phillips, Catherine L / Brash, Alistair J / McCutcheon, Dara P S / Iles-Smith, Jake / Clarke, Edmund / Royall, Benjamin / Skolnick, Maurice S / Fox, A Mark / Nazir, Ahsan

    Physical review letters

    2020  Volume 125, Issue 4, Page(s) 43603

    Abstract: Spectral filtering of resonance fluorescence is widely employed to improve single photon purity and indistinguishability by removing unwanted backgrounds. For filter bandwidths approaching the emitter linewidth, complex behavior is predicted due to ... ...

    Abstract Spectral filtering of resonance fluorescence is widely employed to improve single photon purity and indistinguishability by removing unwanted backgrounds. For filter bandwidths approaching the emitter linewidth, complex behavior is predicted due to preferential transmission of components with differing photon statistics. We probe this regime using a Purcell-enhanced quantum dot in both weak and strong excitation limits, finding excellent agreement with an extended sensor theory model. By changing only the filter width, the photon statistics can be transformed between antibunched, bunched, or Poissonian. Our results verify that strong antibunching and a subnatural linewidth cannot simultaneously be observed, providing new insight into the nature of coherent scattering.
    Language English
    Publishing date 2020-08-14
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.125.043603
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

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  4. Article ; Online: Light Scattering from Solid-State Quantum Emitters: Beyond the Atomic Picture.

    Brash, Alistair J / Iles-Smith, Jake / Phillips, Catherine L / McCutcheon, Dara P S / O'Hara, John / Clarke, Edmund / Royall, Benjamin / Wilson, Luke R / Mørk, Jesper / Skolnick, Maurice S / Fox, A Mark / Nazir, Ahsan

    Physical review letters

    2019  Volume 123, Issue 16, Page(s) 167403

    Abstract: Coherent scattering of light by a single quantum emitter is a fundamental process at the heart of many proposed quantum technologies. Unlike atomic systems, solid-state emitters couple to their host lattice by phonons. Using a quantum dot in an optical ... ...

    Abstract Coherent scattering of light by a single quantum emitter is a fundamental process at the heart of many proposed quantum technologies. Unlike atomic systems, solid-state emitters couple to their host lattice by phonons. Using a quantum dot in an optical nanocavity, we resolve these interactions in both time and frequency domains, going beyond the atomic picture to develop a comprehensive model of light scattering from solid-state emitters. We find that even in the presence of a low-Q cavity with high Purcell enhancement, phonon coupling leads to a sideband that is completely insensitive to excitation conditions and to a nonmonotonic relationship between laser detuning and coherent fraction, both of which are major deviations from atomlike behavior.
    Language English
    Publishing date 2019-11-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.123.167403
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 4' 58/153: Show issues

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  5. Article ; Online: High Purcell factor generation of indistinguishable on-chip single photons.

    Liu, Feng / Brash, Alistair J / O'Hara, John / Martins, Luis M P P / Phillips, Catherine L / Coles, Rikki J / Royall, Benjamin / Clarke, Edmund / Bentham, Christopher / Prtljaga, Nikola / Itskevich, Igor E / Wilson, Luke R / Skolnick, Maurice S / Fox, A Mark

    Nature nanotechnology

    2018  Volume 13, Issue 9, Page(s) 835–840

    Abstract: On-chip single-photon sources are key components for integrated photonic quantum technologies. Semiconductor quantum dots can exhibit near-ideal single-photon emission, but this can be significantly degraded in on-chip geometries owing to nearby etched ... ...

    Abstract On-chip single-photon sources are key components for integrated photonic quantum technologies. Semiconductor quantum dots can exhibit near-ideal single-photon emission, but this can be significantly degraded in on-chip geometries owing to nearby etched surfaces. A long-proposed solution to improve the indistinguishablility is to use the Purcell effect to reduce the radiative lifetime. However, until now only modest Purcell enhancements have been observed. Here we use pulsed resonant excitation to eliminate slow relaxation paths, revealing a highly Purcell-shortened radiative lifetime (22.7 ps) in a waveguide-coupled quantum dot-photonic crystal cavity system. This leads to near-lifetime-limited single-photon emission that retains high indistinguishablility (93.9%) on a timescale in which 20 photons may be emitted. Nearly background-free pulsed resonance fluorescence is achieved under π-pulse excitation, enabling demonstration of an on-chip, on-demand single-photon source with very high potential repetition rates.
    Language English
    Publishing date 2018-07-16
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2254964-X
    ISSN 1748-3395 ; 1748-3387
    ISSN (online) 1748-3395
    ISSN 1748-3387
    DOI 10.1038/s41565-018-0188-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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