Understanding photoluminescence in semiconductor Bragg-reflection waveguides

Auchter, Silke; Schlager, Andreas; Thiel, Hannah; Laiho, Kaisa; Pressl, Benedikt; Suchomel, Holger; Kamp, M.; Höfling, Sven; Schneider, Christian; Weihs, Gregor

doi:10.1088/2040-8986/abd888

Cited by 8 publications

(4 citation statements)

References 52 publications

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“…Experiments with Bragg reflection waveguides have been performed in both in the pulsed and continuous wave (CW) regime. For experiments in the pulsed regime we refer to the works done in the groups of A. Helmy and G. Weihs [35], [36].…”

Section: B Generated Quantum State and Polarization Entanglementmentioning

confidence: 99%

Nonlinear Quantum Photonics With AlGaAs Bragg-Reflection Waveguides

Appas¹,

Meskine²,

Lemaı̂tre

et al. 2022

J. Lightwave Technol.

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Integrated photonics is playing a key role in the development of quantum technologies covering applications ranging from quantum communication to computing and from simulations to sensing. In this context, material platforms enabling the chipscale integration of quantum components are a key issue on the way towards real-world and large-scale technological implementations. In this paper, we review our last achievements on AlGaAs Bragg reflection waveguides emitting nonclassical states of light by spontaneous parametric down conversion. The choice of this platform combines the advantages of a mature fabrication technology, room temperature operation, emission in the telecom C-Band and compliance with electrical injection. We demonstrate the ability of these devices to generate a large variety of quantum states spanning from biphoton frequency combs to broadband polarization entanglement enabling promising applications in quantum processing as well as flexible quantum networks.

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Section: B Generated Quantum State and Polarization Entanglementmentioning

confidence: 99%

Nonlinear Quantum Photonics With AlGaAs Bragg-Reflection Waveguides

Appas¹,

Meskine²,

Lemaı̂tre

et al. 2022

J. Lightwave Technol.

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“…photoluminescence, dark counts and stray light). Note that we have chosen to tune the seed power since photoluminescent background light is not promoted by telecom wavelengths and is thus a constant in our measurement [33]. We determine the conversion efficiency…”

mentioning

confidence: 99%

Difference-frequency generation in an AlGaAs Bragg-reflection waveguide using an on-chip electrically-pumped quantum dot laser

Schlager

Götsch

Chapman

et al. 2021

J. Opt.

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Nonlinear frequency conversion is ubiquitous in laser engineering and quantum information technology. A long-standing goal in photonics is to integrate on-chip semiconductor laser sources with nonlinear optical components. Engineering waveguide lasers with spectra that phase-match to nonlinear processes on the same device is a formidable challenge. Here, we demonstrate difference-frequency generation in an AlGaAs Bragg reflection waveguide which incorporates the gain medium for the pump laser in its core. We include quantum dot layers in the waveguide that generate electrically driven laser light at ∼790 nm, and engineer the structure to facilitate nonlinear processes at this wavelength. We perform difference-frequency generation between 1540 nm and 1630 nm using the on-chip laser, which is enabled by the broad modal phase-matching of the AlGaAs waveguide, and measure normalized conversion efficiencies up to ( 0.64 ± 0.21 )% W−1 cm−2. Our work demonstrates a pathway towards devices that utilize on-chip active elements and strong optical nonlinearities to enable highly integrated photonic systems-on-chip.

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“…We attribute the increased purity of the entanglement to the hybrid integration of BRW and PolyBoard, as the PIC offers optical stability and the end-facet coupling reduces the amount of unwanted photoluminescence picked up from the BRW 62 . Moreover, the of reduces the rate of the accidental coincidences and the strong suppression of the LP of dB obviates the need for additional bandwidth filtering or background suppression.…”

Section: Discussionmentioning

confidence: 99%

Time-bin entanglement at telecom wavelengths from a hybrid photonic integrated circuit

Thiel,

Jehle,

Chapman

et al. 2024

Sci Rep

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Mass-deployable implementations for quantum communication require compact, reliable, and low-cost hardware solutions for photon generation, control and analysis. We present a fiber-pigtailed hybrid photonic circuit comprising nonlinear waveguides for photon-pair generation and a polymer interposer reaching $${68}\,\hbox {dB}$$ 68 dB of pump suppression and photon separation based on a polarizing beam splitter with $$>{25}\,\hbox {dB}$$ > 25 dB polarization extinction ratio. The optical stability of the hybrid assembly enhances the quality of the entanglement, and the efficient background suppression and photon routing further reduce accidental coincidences. We thus achieve a $$\left( 96_{-8}^{+3}\right) \%$$ 96 - 8 + 3 % concurrence and a $$\left( 96_{-5}^{+2}\right) \%$$ 96 - 5 + 2 % fidelity to a Bell state. The generated telecom-wavelength, time-bin entangled photon pairs are ideally suited for distributing Bell pairs over fiber networks with low dispersion.

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Understanding photoluminescence in semiconductor Bragg-reflection waveguides

Cited by 8 publications

References 52 publications

Nonlinear Quantum Photonics With AlGaAs Bragg-Reflection Waveguides

Nonlinear Quantum Photonics With AlGaAs Bragg-Reflection Waveguides

Difference-frequency generation in an AlGaAs Bragg-reflection waveguide using an on-chip electrically-pumped quantum dot laser

Time-bin entanglement at telecom wavelengths from a hybrid photonic integrated circuit

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