High-Performance Single-Photon Sources at Telecom Wavelength Based on Broadband Hybrid Circular Bragg Gratings

Barbiero, Andrea; Huwer, Jan; Skiba-Szymanska, J.; Ellis, David; Stevenson, R. M.; Müller, Tina; Shooter, Ginny; Goff, Lucy E.; Ritchie, David A.; Shields, A. J.

doi:10.1021/acsphotonics.2c00810

Cited by 22 publications

(17 citation statements)

References 45 publications

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“…With this, CBGs are capable of simultaneously supporting both transitions of the biexciton-exciton cascade, generating polarization-entangled photon pairs. [29,30] CBGs have been reported for the telecom Oband [31][32][33] and the design parameters have been investigated by simulations for the GaAs and InP system [27,34] for the telecom Cband, however, an experimental realization had yet to be demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Bright Source of Purcell‐Enhanced, Triggered, Single Photons in the Telecom C‐Band

Nawrath,

Joos,

Kolatschek

et al. 2023

Adv Quantum Tech

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Several emission features mark semiconductor quantum dots as promising non‐classical light sources for prospective quantum implementations. For long‐distance transmission and Si‐based on‐chip processing, the possibility to match the telecom C‐band is decisive, while source brightness and high single‐photon purity are key features in virtually any quantum implementation. An InAs/InGaAs/GaAs quantum dot emitting in the telecom C‐band coupled to a circular Bragg grating is presented here. This cavity structure stands out due to its high broadband collection efficiency and high attainable Purcell factors. Here, simultaneously high brightness with a fiber‐coupled single‐photon count rate of 13.9 MHz for an excitation repetition rate of 228 MHz (first‐lens single‐photon collection efficiency ≈17% for NA = 0.6), while maintaining a low multi‐photon contribution of is demonstrated. Moreover, the compatibility with temperatures of up to 40 K attainable with compact cryo coolers, further underlines the suitability for out‐of‐the‐lab implementations.

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Section: Introductionmentioning

confidence: 99%

Bright Source of Purcell‐Enhanced, Triggered, Single Photons in the Telecom C‐Band

Nawrath,

Joos,

Kolatschek

et al. 2023

Adv Quantum Tech

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“…[ 95 ] These QDs can also be deterministically coupled to hybrid circular Bragg resonators to enhance their collection efficiency. [ .98,97 ]…”

Section: Solid‐state Single‐photon Sources In the Infraredmentioning

confidence: 99%

Perspective on Solid‐State Single‐Photon Sources in the Infrared for Quantum Technology

Castelletto,

Boretti

2023

Adv Quantum Tech

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Solid‐state single‐photon sources in the infrared region are crucial for advancing quantum technologies, in particular long‐distance fiber or on‐chip quantum communication, quantum key distribution, quantum computing, quantum sensing and metrology, and fundamental research. The ability to generate and manipulate individual photons in the infrared spectrum is an area of expansion due to the availability of advanced material quality or new emerging materials. The latest advancements in the discovery and utilization of single‐photon sources in various material platforms and their foreseeable future development are here summarized.

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“…From Ref. [64][65][66][67][68][69][70][71][72], we can treat the single photon sources as the on-demand sources. In contrast, the practical spontaneous parametric down-conversion source adopted in the original DI-QSDC protocol [30] can generate the mixed state as [61]…”

Section: Heralded Long-distance Entanglement Distribution Based On Si...mentioning

confidence: 99%

“…Soon later, a single-photon source at the telecom wavelength based on InAs/GaAs quantum dots was reported. This single photon source has the bright single-photon emission with Purcell factor > 5 and count rates up to 10 MHz [72]. Meanwhile, the heralded architectures have been used to construct the entanglement channel, which can eliminate the influence from photon transmission loss on the Bell (CHSH) violations [50].…”

Section: Introductionmentioning

confidence: 99%

Device-independent quantum secure direct communication with single photon sources

Zhou,

Xu,

Zhong

et al. 2023

Preprint

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Quantum secure direct communication (QSDC) can directly transmit secrete messages through quantum channel. Device-independent (DI) QSDC can guarantee the communication security relying only on the observation of the Bell inequality violation, but not on any detailed description or trust of the inner workings of users' devices. In the paper, we propose a DI-QSDC protocol with practical high-efficient single photon sources. The communication parties construct the entanglement channel from single photons by adopting the heralded architecture, which makes the message leakage rate independent of the photon transmission loss. The secure communication distance and the practical communication efficiency of the current DI-QSDC protocol are about 6 times and 600 times of those in the original DI-QSDC protocol. Combining with the entanglement purification, the parties can construct the nearly perfect entanglement channel and completely eliminate the message leakage. This DI-QSDC protocol may have important application in future quantum communication field.

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High-Performance Single-Photon Sources at Telecom Wavelength Based on Broadband Hybrid Circular Bragg Gratings

Cited by 22 publications

References 45 publications

Bright Source of Purcell‐Enhanced, Triggered, Single Photons in the Telecom C‐Band

Bright Source of Purcell‐Enhanced, Triggered, Single Photons in the Telecom C‐Band

Perspective on Solid‐State Single‐Photon Sources in the Infrared for Quantum Technology

Device-independent quantum secure direct communication with single photon sources

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