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Integration of Colloidal PbS/CdS Quantum Dots with Plasmonic Antennas and Superconducting Detectors on a Silicon Nitride Photonic Platform
Univ Ghent, IMEC, Photon Res Grp, B-9052 Ghent, Belgium.;Univ Ghent, NB Photon, B-9052 Ghent, Belgium..
Single Quantum BV, NL-2628 CJ Delft, Netherlands..
Delft Univ Technol, Opt Res Grp, NL-2628 CJ Delft, Netherlands..
Univ Ghent, NB Photon, B-9052 Ghent, Belgium.;Univ Ghent, Phys & Chem Nanostruct Grp, B-9000 Ghent, Belgium..
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2019 (English)In: Nano letters (Print), ISSN 1530-6984, E-ISSN 1530-6992, Vol. 19, no 8, p. 5452-5458Article in journal (Refereed) Published
Abstract [en]

Single-photon sources and detectors are indispensable building blocks for integrated quantum photonics, a research field that is seeing ever increasing interest for numerous applications. In this work, we implemented essential components for a quantum key distribution transceiver on a single photonic chip. Plasmonic antennas on top of silicon nitride waveguides provide Purcell enhancement with a concurrent increase of the count rate, speeding up the microsecond radiative lifetime of IR-emitting colloidal PbS/CdS quantum dots (QDs). The use of low-fluorescence silicon nitride, with a waveguide loss smaller than 1 dB/cm, made it possible to implement high extinction ratio optical filters and low insertion loss spectrometers. Waveguide-coupled superconducting nanowire single-photon detectors allow for low time-jitter single-photon detection. To showcase the performance of the components, we demonstrate on-chip lifetime spectroscopy of PbS/CdS QDs. The method developed in this paper is predicted to scale down to single QDs, and newly developed emitters can be readily integrated on the chip-based platform.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2019. Vol. 19, no 8, p. 5452-5458
Keywords [en]
Colloidal quantum dots, plasmonic antennas, superconducting nanowire single photon detector, hybrid integrated photonics
National Category
Nano Technology
Identifiers
URN: urn:nbn:se:kth:diva-257822DOI: 10.1021/acs.nanolett.9b01948ISI: 000481563800082PubMedID: 31313928Scopus ID: 2-s2.0-85071350662OAI: oai:DiVA.org:kth-257822DiVA, id: diva2:1348968
Note

QC 20190906

Available from: 2019-09-06 Created: 2019-09-06 Last updated: 2019-09-06Bibliographically approved

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Zwiller, Val

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