Single Quantum Dot with Microlens and 3D-Printed Micro-objective as Integrated Bright Single-Photon Source

Fischbach, Sarah; Schlehahn, Alexander; Thoma, Alexander; Srocka, Nicole; Gissibl, Timo; Ristok, Simon; Thiele, Simon; Kaganskiy, Arsenty; Strittmatter, A.; Heindel, Tobias; Rodt, Sven; Herkommer, Alois; Gießen, Harald; Reitzenstein, Stephan

doi:10.1021/acsphotonics.7b00253

Cited by 71 publications

(45 citation statements)

References 41 publications

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“…4 a and b. We anticipate significantly improved coupling efficiencies into optical fibers, by employing recently developed on-chip micro-optics 38 in future QSource modules.…”

Section: Turn-key Single-photon Generationmentioning

confidence: 98%

A stand-alone fiber-coupled single-photon source

Schlehahn

Fischbach

Schmidt

et al. 2018

Sci Rep

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In this work, we present a stand-alone and fiber-coupled quantum-light source. The plug-and-play device is based on an optically driven quantum dot delivering single photons via an optical fiber. The quantum dot is deterministically integrated in a monolithic microlens which is precisely coupled to the core of an optical fiber via active optical alignment and epoxide adhesive bonding. The rigidly coupled fiber-emitter assembly is integrated in a compact Stirling cryocooler with a base temperature of 35 K. We benchmark our practical quantum device via photon auto-correlation measurements revealing g(2)(0) = 0.07 ± 0.05 under continuous-wave excitation and we demonstrate triggered non-classical light at a repetition rate of 80 MHz. The long-term stability of our quantum light source is evaluated by endurance tests showing that the fiber-coupled quantum dot emission is stable within 4% over several successive cool-down/warm-up cycles. Additionally, we demonstrate non-classical photon emission for a user-intervention-free 100-hour test run and stable single-photon count rates up to 11.7 kHz with a standard deviation of 4%.

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“…4 a and b. We anticipate significantly improved coupling efficiencies into optical fibers, by employing recently developed on-chip micro-optics 38 in future QSource modules.…”

Section: Turn-key Single-photon Generationmentioning

confidence: 98%

A stand-alone fiber-coupled single-photon source

Schlehahn

Fischbach

Schmidt

et al. 2018

Sci Rep

Self Cite

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“…This is again a result of much increased hydrostatic strain in the latter case, since the GaP substrate provides a considerably larger confinement for quasiparticles than the former. The aforementioned hints to the conclusion that QD structures grown on GaP might perform even better in optoelectronic applications than those grown on GaAs substrates which are currently under study [80]. 11.…”

Section: γ-Excitonsmentioning

confidence: 99%

Electronic states of (InGa)(AsSb)/GaAs/GaP quantum dots

2019

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Detailed theoretical studies of the electronic structure of (InGa)(AsSb)/GaAs/GaP quantum dots are presented. This system is unique since it exhibits concurrently direct and indirect transitions both in real and momentum space and is attractive for applications in quantum information technology, showing advantages as compared to the widely studied (In,Ga)As/GaAs dots. We proceed from the inspection of the confinement potentials for k = 0 and k = 0 conduction and k = 0 valence bands, through the formulation of k · p calculations for k-indirect transitions, up to the excitonic structure of Γ-transitions. Throughout this process we compare the results obtained for dots on both GaP and GaAs substrates, enabling us to make a direct comparison to the (In,Ga)As/GaAs quantum dot system. We also discuss the realization of quantum gates.

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“…The reported brightness is 0.23 ± 0.03 using a numerical aperture of

N A = 0.4

and collection efficiencies >0.8 are expected using more sophisticated lens designs . Moreover, a collection efficiency of 0.4 ± 0.04 has been demonstrated using the combination of a monolithic microlens combined with a 3D printed microobjective . Since microlenses are not high‐Q resonators which enhance the emission rate they operate broadband.…”

Section: Single Photonsmentioning

confidence: 99%

Generation of Non‐Classical Light Using Semiconductor Quantum Dots

et al. 2019

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Sources of non‐classical light are of paramount importance for future applications in quantum science and technology such as quantum communication, quantum computation and simulation, quantum sensing, and quantum metrology. This Review is focused on the fundamentals and recent progress in the generation of single photons, entangled photon pairs, and photonic cluster states using semiconductor quantum dots. Specific fundamentals which are discussed are a detailed quantum description of light, properties of semiconductor quantum dots, and light–matter interactions. This includes a framework for the dynamic modeling of non‐classical light generation and two‐photon interference. Recent progress is discussed in the generation of non‐classical light for off‐chip applications as well as implementations for scalable on‐chip integration.

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Single Quantum Dot with Microlens and 3D-Printed Micro-objective as Integrated Bright Single-Photon Source

Cited by 71 publications

References 41 publications

A stand-alone fiber-coupled single-photon source

A stand-alone fiber-coupled single-photon source

Electronic states of (InGa)(AsSb)/GaAs/GaP quantum dots

Generation of Non‐Classical Light Using Semiconductor Quantum Dots

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