Generation of entangled photon pairs from a silicon bichromatic photonic crystal cavity
Integrated quantum photonics leverages the on-chip generation of nonclassical states of light to realize key functionalities of quantum devices. Typically, the generation of such nonclassical states relies on whispering gallery mode resonators, such as integrated optical micro-rings, which enhance t...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2024-01-01
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| Series: | APL Photonics |
| Online Access: | http://dx.doi.org/10.1063/5.0170292 |
| _version_ | 1797332129991884800 |
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| author | Andrea Barone Marco Clementi Thanavorn Poempool Alessandro Marcia Daniele Bajoni Marco Liscidini Dario Gerace Thomas Fromherz Matteo Galli |
| author_facet | Andrea Barone Marco Clementi Thanavorn Poempool Alessandro Marcia Daniele Bajoni Marco Liscidini Dario Gerace Thomas Fromherz Matteo Galli |
| author_sort | Andrea Barone |
| collection | DOAJ |
| description | Integrated quantum photonics leverages the on-chip generation of nonclassical states of light to realize key functionalities of quantum devices. Typically, the generation of such nonclassical states relies on whispering gallery mode resonators, such as integrated optical micro-rings, which enhance the efficiency of the underlying spontaneous nonlinear processes. While these kinds of resonators excel in maximizing either the temporal confinement or the spatial overlap between different resonant modes, they are usually associated with large mode volumes, imposing an intrinsic limitation on the efficiency and footprint of the device. Here, we engineer a source of time-energy entangled photon pairs based on a silicon photonic crystal cavity, implemented in a fully CMOS-compatible platform. In this device, resonantly enhanced spontaneous four-wave mixing converts pump photon pairs into signal/idler photon pairs under the energy-conserving condition in the telecommunication C-band. The design of the resonator is based on an effective bichromatic confinement potential, allowing it to achieve up to nine close-to-equally spaced modes in frequency, while preserving small mode volumes, and the whole chip, including grating couplers and access waveguides, is fabricated in a single run on a silicon-on-insulator platform. Besides demonstrating efficient photon pair generation, we also implement a Franson-type interference experiment, demonstrating entanglement between signal and idler photons with a Bell inequality violation exceeding five standard deviations. The high generation efficiency combined with the small device footprint in a CMOS-compatible integrated structure opens a pathway toward the implementation of compact quantum light sources in all-silicon photonic platforms. |
| first_indexed | 2024-03-08T07:45:10Z |
| format | Article |
| id | doaj.art-b119ed6fa28f40108712e3e68d54b668 |
| institution | Directory Open Access Journal |
| issn | 2378-0967 |
| language | English |
| last_indexed | 2024-03-08T07:45:10Z |
| publishDate | 2024-01-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Photonics |
| spelling | doaj.art-b119ed6fa28f40108712e3e68d54b6682024-02-02T16:27:16ZengAIP Publishing LLCAPL Photonics2378-09672024-01-0191016110016110-710.1063/5.0170292Generation of entangled photon pairs from a silicon bichromatic photonic crystal cavityAndrea Barone0Marco Clementi1Thanavorn Poempool2Alessandro Marcia3Daniele Bajoni4Marco Liscidini5Dario Gerace6Thomas Fromherz7Matteo Galli8Dipartimento di Fisica, Università di Pavia, via Bassi 6, 27100 Pavia, ItalyPhotonic Systems Laboratory, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, SwitzerlandInstitute of Semiconductor and Solid State Physics, Johannes Kepler University, Altenberger Str. 69, 4040 Linz, AustriaDipartimento di Fisica, Università di Pavia, via Bassi 6, 27100 Pavia, ItalyDipartimento di Ingegneria Industriale e dell’Informazione, Università di Pavia, via Ferrata 3, 27100 Pavia, ItalyDipartimento di Fisica, Università di Pavia, via Bassi 6, 27100 Pavia, ItalyDipartimento di Fisica, Università di Pavia, via Bassi 6, 27100 Pavia, ItalyInstitute of Semiconductor and Solid State Physics, Johannes Kepler University, Altenberger Str. 69, 4040 Linz, AustriaDipartimento di Fisica, Università di Pavia, via Bassi 6, 27100 Pavia, ItalyIntegrated quantum photonics leverages the on-chip generation of nonclassical states of light to realize key functionalities of quantum devices. Typically, the generation of such nonclassical states relies on whispering gallery mode resonators, such as integrated optical micro-rings, which enhance the efficiency of the underlying spontaneous nonlinear processes. While these kinds of resonators excel in maximizing either the temporal confinement or the spatial overlap between different resonant modes, they are usually associated with large mode volumes, imposing an intrinsic limitation on the efficiency and footprint of the device. Here, we engineer a source of time-energy entangled photon pairs based on a silicon photonic crystal cavity, implemented in a fully CMOS-compatible platform. In this device, resonantly enhanced spontaneous four-wave mixing converts pump photon pairs into signal/idler photon pairs under the energy-conserving condition in the telecommunication C-band. The design of the resonator is based on an effective bichromatic confinement potential, allowing it to achieve up to nine close-to-equally spaced modes in frequency, while preserving small mode volumes, and the whole chip, including grating couplers and access waveguides, is fabricated in a single run on a silicon-on-insulator platform. Besides demonstrating efficient photon pair generation, we also implement a Franson-type interference experiment, demonstrating entanglement between signal and idler photons with a Bell inequality violation exceeding five standard deviations. The high generation efficiency combined with the small device footprint in a CMOS-compatible integrated structure opens a pathway toward the implementation of compact quantum light sources in all-silicon photonic platforms.http://dx.doi.org/10.1063/5.0170292 |
| spellingShingle | Andrea Barone Marco Clementi Thanavorn Poempool Alessandro Marcia Daniele Bajoni Marco Liscidini Dario Gerace Thomas Fromherz Matteo Galli Generation of entangled photon pairs from a silicon bichromatic photonic crystal cavity APL Photonics |
| title | Generation of entangled photon pairs from a silicon bichromatic photonic crystal cavity |
| title_full | Generation of entangled photon pairs from a silicon bichromatic photonic crystal cavity |
| title_fullStr | Generation of entangled photon pairs from a silicon bichromatic photonic crystal cavity |
| title_full_unstemmed | Generation of entangled photon pairs from a silicon bichromatic photonic crystal cavity |
| title_short | Generation of entangled photon pairs from a silicon bichromatic photonic crystal cavity |
| title_sort | generation of entangled photon pairs from a silicon bichromatic photonic crystal cavity |
| url | http://dx.doi.org/10.1063/5.0170292 |
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