Solid-state single photon sources: light collection strategies

Barnes, Bill; Björk, Gunnar; Gerard, Jean‐Michel; Jönsson, Per; Wasey, J. A. E.; Worthing, P. T.; Zwiller, Valéry

doi:10.1140/epjd/e20020024

Cited by 155 publications

(123 citation statements)

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“…However, losses can still arise from the sidewall roughness when reducing the pillar diameter. As a result, we expect the coupling to the external field to be given by Z ¼ Q/Q 0, where Q and Q 0 are the quality factors of the pillar mode and the planar cavity, respectively 25 . Figure 1c shows a fit to typical experimentally measured Q/Q 0 for our etching conditions for a planar quality factor of Q 0 ¼ 3,000 (Methods).…”

Section: Resultsmentioning

confidence: 99%

Bright solid-state sources of indistinguishable single photons

et al. 2013

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Bright sources of indistinguishable single photons are strongly needed for the scalability of quantum information processing. Semiconductor quantum dots are promising systems to build such sources. Several works demonstrated emission of indistinguishable photons while others proposed various approaches to efficiently collect them. Here we combine both properties and report on the fabrication of ultrabright sources of indistinguishable single photons, thanks to deterministic positioning of single quantum dots in well-designed pillar cavities. Brightness as high as 0.79±0.08 collected photon per pulse is demonstrated. The indistinguishability of the photons is investigated as a function of the source brightness and the excitation conditions. We show that a two-laser excitation scheme allows reducing the fluctuations of the quantum dot electrostatic environment under high pumping conditions. With this method, we obtain 82 ± 10% indistinguishability for a brightness as large as 0.65 ± 0.06 collected photon per pulse.

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Section: Resultsmentioning

confidence: 99%

Bright solid-state sources of indistinguishable single photons

et al. 2013

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“…It is possible to fabricate QDs in a GaAs spacer layer, either as high-density ensembles for room temperature operation or as single-emitters at low temperature, that emit at 1.3 μm wavelengths [6], [7]. Another challenge is that QDs emit isotropically and are incorporated in high refractive index materials, which makes efficient photon extraction difficult [8].…”

Section: Introductionmentioning

confidence: 99%

Tamm plasmons for efficient interaction of telecom wavelength photons and quantum dots

Parker

Harbord

Young

et al. 2018

IET Optoelectronics

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“…In contrast to planar sample structures, for which total internal reflection limits the PEE to less than 1% [23], the microlens design leads to significantly higher PEEs because of its curved surface. However, the device is still suffering from partial reflection at the semiconductor-vacuum interface.…”

Section: Device Fabrication and Experimental Setupmentioning

confidence: 97%

Bright Single-Photon Sources Based on Anti-Reflection Coated Deterministic Quantum Dot Microlenses

et al. 2015

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Abstract:We report on enhancing the photon-extraction efficiency (PEE) of deterministic quantum dot (QD) microlenses via anti-reflection (AR) coating. The AR-coating deposited on top of the curved microlens surface is composed of a thin layer of Ta 2 O 5 , and is found to effectively reduce back-reflection of light at the semiconductor-vacuum interface. A statistical analysis of spectroscopic data reveals, that the AR-coating improves the light out-coupling of respective microlenses by a factor of 1.57˘0.71, in quantitative agreement with numerical calculations. Taking the enhancement factor into account, we predict improved out-coupling of light with a PEE of up to 50%. The quantum nature of emission from QDs integrated into AR-coated microlenses is demonstrated via photon auto-correlation measurements revealing strong suppression of two-photon emission events with g (2) (0) = 0.05˘0.02. As such, these bright non-classical light sources are highly attractive with respect to applications in the field of quantum cryptography.

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Solid-state single photon sources: light collection strategies

Cited by 155 publications

References 0 publications

Bright solid-state sources of indistinguishable single photons

Bright solid-state sources of indistinguishable single photons

Tamm plasmons for efficient interaction of telecom wavelength photons and quantum dots

Bright Single-Photon Sources Based on Anti-Reflection Coated Deterministic Quantum Dot Microlenses

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