Fully On-Chip Source of Polarization/Time-Energy Entangled Photons

Zacharie M. Léger; Trevor J. Stirling; Meng Lon Iu; Amr S. Helmy

doi:10.1109/LPT.2025.3625097

Fully On-Chip Source of Polarization/Time-Energy Entangled Photons

Zacharie M. Léger, Trevor J. Stirling, Meng Lon Iu, Amr S. Helmy

Quantum Sensing and Computing

Research output: Contribution to journal › Article › peer-review

Abstract

We demonstrate the first all-on-chip source of entangled photons in polarization or time-energy. Our source is a monolithic Bragg reflection laser diode with intracavity phase matching, enabling a type-II spontaneous parametric down-conversion process. This plug-and-play, electrically injected chip source operates at room temperature and does not require active stabilization. The entangled biphoton state emitted from the chip is in the telecom band, with a bandwidth of 5.56 THz, achieving a pair rate of 5.6×10⁵ pairs/s. Additionally, a visibility of 76.2% and 58% was obtained for the polarization and time-energy entanglements, respectively. Hence, our source opens the possibility for massively parallel systems from a compact and low-power chip.

Original language	English
Pages (from-to)	180-183
Number of pages	4
Journal	IEEE Photonics Technology Letters
Volume	38
Issue number	3
DOIs	https://doi.org/10.1109/LPT.2025.3625097
State	Accepted/In press - 2025

Funding

The authors acknowledge the Mike & Ophelia Lazaridis Quantum-Nano Centre at the University of Waterloo. Disclosures: Amr S. Helmy has filed for a patent (US7715677B2) related to this work. All other authors declare no other competing interests.

Keywords

Bragg-reflection waveguide
Quantum entanglement
integrated quantum photonics

Access to Document

10.1109/LPT.2025.3625097

Cite this

@article{0967446a2aa04bba820654a0c455f08e,

title = "Fully On-Chip Source of Polarization/Time-Energy Entangled Photons",

abstract = "We demonstrate the first all-on-chip source of entangled photons in polarization or time-energy. Our source is a monolithic Bragg reflection laser diode with intracavity phase matching, enabling a type-II spontaneous parametric down-conversion process. This plug-and-play, electrically injected chip source operates at room temperature and does not require active stabilization. The entangled biphoton state emitted from the chip is in the telecom band, with a bandwidth of 5.56 THz, achieving a pair rate of 5.6×105 pairs/s. Additionally, a visibility of 76.2\% and 58\% was obtained for the polarization and time-energy entanglements, respectively. Hence, our source opens the possibility for massively parallel systems from a compact and low-power chip.",

keywords = "Bragg-reflection waveguide, Quantum entanglement, integrated quantum photonics",

author = "L{\'e}ger, \{Zacharie M.\} and Stirling, \{Trevor J.\} and \{Lon Iu\}, Meng and Helmy, \{Amr S.\}",

note = "Publisher Copyright: {\textcopyright} 1989-2012 IEEE.",

year = "2025",

doi = "10.1109/LPT.2025.3625097",

language = "English",

volume = "38",

pages = "180--183",

journal = "IEEE Photonics Technology Letters",

issn = "1041-1135",

publisher = "Institute of Electrical and Electronics Engineers",

number = "3",

}

TY - JOUR

T1 - Fully On-Chip Source of Polarization/Time-Energy Entangled Photons

AU - Léger, Zacharie M.

AU - Stirling, Trevor J.

AU - Lon Iu, Meng

AU - Helmy, Amr S.

PY - 2025

Y1 - 2025

N2 - We demonstrate the first all-on-chip source of entangled photons in polarization or time-energy. Our source is a monolithic Bragg reflection laser diode with intracavity phase matching, enabling a type-II spontaneous parametric down-conversion process. This plug-and-play, electrically injected chip source operates at room temperature and does not require active stabilization. The entangled biphoton state emitted from the chip is in the telecom band, with a bandwidth of 5.56 THz, achieving a pair rate of 5.6×105 pairs/s. Additionally, a visibility of 76.2% and 58% was obtained for the polarization and time-energy entanglements, respectively. Hence, our source opens the possibility for massively parallel systems from a compact and low-power chip.

AB - We demonstrate the first all-on-chip source of entangled photons in polarization or time-energy. Our source is a monolithic Bragg reflection laser diode with intracavity phase matching, enabling a type-II spontaneous parametric down-conversion process. This plug-and-play, electrically injected chip source operates at room temperature and does not require active stabilization. The entangled biphoton state emitted from the chip is in the telecom band, with a bandwidth of 5.56 THz, achieving a pair rate of 5.6×105 pairs/s. Additionally, a visibility of 76.2% and 58% was obtained for the polarization and time-energy entanglements, respectively. Hence, our source opens the possibility for massively parallel systems from a compact and low-power chip.

KW - Bragg-reflection waveguide

KW - Quantum entanglement

KW - integrated quantum photonics

UR - https://www.scopus.com/pages/publications/105019968420

U2 - 10.1109/LPT.2025.3625097

DO - 10.1109/LPT.2025.3625097

M3 - Article

AN - SCOPUS:105019968420

SN - 1041-1135

VL - 38

SP - 180

EP - 183

JO - IEEE Photonics Technology Letters

JF - IEEE Photonics Technology Letters

IS - 3

ER -

Fully On-Chip Source of Polarization/Time-Energy Entangled Photons

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this