An efficient integrated two-color source for heralded single photons
We present a pulsed and integrated, highly non-degenerate parametric down-conversion (PDC) source of heralded single photons at telecom wavelengths, paired with heralding photons around 800 nm. The active PDC section is combined with a passive, integrated wavelength division demultiplexer on-chip, w...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2013-01-01
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| Series: | New Journal of Physics |
| Online Access: | https://doi.org/10.1088/1367-2630/15/3/033010 |
| _version_ | 1797751673709395968 |
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| author | S Krapick H Herrmann V Quiring B Brecht H Suche Ch Silberhorn |
| author_facet | S Krapick H Herrmann V Quiring B Brecht H Suche Ch Silberhorn |
| author_sort | S Krapick |
| collection | DOAJ |
| description | We present a pulsed and integrated, highly non-degenerate parametric down-conversion (PDC) source of heralded single photons at telecom wavelengths, paired with heralding photons around 800 nm. The active PDC section is combined with a passive, integrated wavelength division demultiplexer on-chip, which allows for the spatial separation of signal and idler photons with efficiencies of more than 96.5%, as well as with multi-band reflection and anti-reflection coatings which facilitate low incoupling losses and a pump suppression at the output of the device of more than 99%. Our device is capable of preparing single photons with efficiencies of 60% with a coincidences-to-accidentals ratio exceeding 7400. Likewise, it shows practically no significant background noise compared to continuous wave realizations. For low pump powers, we measure a conditioned second-order correlation function of g ^(2) = 3.8 × 10 ^−3 , which proves almost pure single-photon generation. In addition, our source can feature a high brightness of 〈 n _pulse 〉 = 0.24 generated photon pairs per pump pulse at pump power levels below 100 μ W. The high quality of the pulsed PDC process in conjunction with the integration of highly efficient passive elements makes our device a promising candidate for future quantum networking applications, where an efficient miniaturization plays a crucial role. |
| first_indexed | 2024-03-12T16:52:59Z |
| format | Article |
| id | doaj.art-c39b80df79ec4053a561dfade6d589d1 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:52:59Z |
| publishDate | 2013-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-c39b80df79ec4053a561dfade6d589d12023-08-08T11:07:08ZengIOP PublishingNew Journal of Physics1367-26302013-01-0115303301010.1088/1367-2630/15/3/033010An efficient integrated two-color source for heralded single photonsS Krapick0H Herrmann1V Quiring2B Brecht3H Suche4Ch Silberhorn5Integrated Quantum Optics Group, Department of Physics, University of Paderborn , Warburger Straße 100, D-33098 Paderborn, GermanyIntegrated Quantum Optics Group, Department of Physics, University of Paderborn , Warburger Straße 100, D-33098 Paderborn, GermanyIntegrated Quantum Optics Group, Department of Physics, University of Paderborn , Warburger Straße 100, D-33098 Paderborn, GermanyIntegrated Quantum Optics Group, Department of Physics, University of Paderborn , Warburger Straße 100, D-33098 Paderborn, GermanyIntegrated Quantum Optics Group, Department of Physics, University of Paderborn , Warburger Straße 100, D-33098 Paderborn, GermanyIntegrated Quantum Optics Group, Department of Physics, University of Paderborn , Warburger Straße 100, D-33098 Paderborn, GermanyWe present a pulsed and integrated, highly non-degenerate parametric down-conversion (PDC) source of heralded single photons at telecom wavelengths, paired with heralding photons around 800 nm. The active PDC section is combined with a passive, integrated wavelength division demultiplexer on-chip, which allows for the spatial separation of signal and idler photons with efficiencies of more than 96.5%, as well as with multi-band reflection and anti-reflection coatings which facilitate low incoupling losses and a pump suppression at the output of the device of more than 99%. Our device is capable of preparing single photons with efficiencies of 60% with a coincidences-to-accidentals ratio exceeding 7400. Likewise, it shows practically no significant background noise compared to continuous wave realizations. For low pump powers, we measure a conditioned second-order correlation function of g ^(2) = 3.8 × 10 ^−3 , which proves almost pure single-photon generation. In addition, our source can feature a high brightness of 〈 n _pulse 〉 = 0.24 generated photon pairs per pump pulse at pump power levels below 100 μ W. The high quality of the pulsed PDC process in conjunction with the integration of highly efficient passive elements makes our device a promising candidate for future quantum networking applications, where an efficient miniaturization plays a crucial role.https://doi.org/10.1088/1367-2630/15/3/033010 |
| spellingShingle | S Krapick H Herrmann V Quiring B Brecht H Suche Ch Silberhorn An efficient integrated two-color source for heralded single photons New Journal of Physics |
| title | An efficient integrated two-color source for heralded single photons |
| title_full | An efficient integrated two-color source for heralded single photons |
| title_fullStr | An efficient integrated two-color source for heralded single photons |
| title_full_unstemmed | An efficient integrated two-color source for heralded single photons |
| title_short | An efficient integrated two-color source for heralded single photons |
| title_sort | efficient integrated two color source for heralded single photons |
| url | https://doi.org/10.1088/1367-2630/15/3/033010 |
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