Narrow Optical Transitions in Erbium-Implanted Silicon Waveguides

Gritsch, Andreas; Weiss, Lorenz; Früh, Johannes; Rinner, Stephan; Reiserer, Andreas

doi:10.1103/physrevx.12.041009

Cited by 26 publications

(38 citation statements)

References 52 publications

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“…It is also worth noting that modern fabrication techniques can embed emitters into spheres with nanometer precision in radial direction for a number of different materials. 42,43 A controlled positioning of emitters outside the sphere is possible by attaching emitters to (nano)particles via molecular techniques such as using single-stranded DNA (ssDNA) spacers 44 or DNA origami. 45 Therefore, we consider situations with both an emitter inside and outside a TiO 2 sphere.…”

Section: Resultsmentioning

confidence: 99%

Fluorescence enhancement via lossless all-dielectric spherical mesocavities

Zakomirnyi¹,

Moroz²,

Bhargava³

et al. 2023

Preprint

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Metal nanoparticles have traditionally been used to enhance optical signals, including fluorescence from a dye proximal to the particle. Here, we sought to examine whether appreciable enhancement was possible using relatively simple all-dielectric particles. Using rapid numerical simulations, we deduce that lossless all-dielectric spherical particles with mesoscale sizes, between nanoscale ( 100 nm) and microscale ( 1 µm), are surprisingly suitable for fluorescence enhancement demonstrating up to F ∼ 10 4 enhancement factors. We discuss both the enhancement possible as well as limiting losses, which are distinct from those observed in metal particles. For a given sphere of a specific refractive index size matters: much larger fluorescence enhancement can be achieved with meso-sized particles than with particles of smaller size. The enhancement originates from multipolar ( 410) resonances which induce much stronger electric field enhancement within spheres. The order, , of these resonances is larger than conventionally utilized dipolar or quadrupolar Mie resonances in nanoparticles 1

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Section: Resultsmentioning

confidence: 99%

Fluorescence enhancement via lossless all-dielectric spherical mesocavities

Zakomirnyi¹,

Moroz²,

Bhargava³

et al. 2023

Preprint

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“…The emission of the Er +3 ion lies in the C-band 41 , whereas the C-centre exhibits ZPL in the most favourable L-band 24,25 , regarding the optical fibre transmission loss. However, the former shows a very long radiative lifetime of about 1−2 ms 42,43 , which can be decreased 10-fold with integration inside silicon waveguides 44 . Moreover, emission enhancement up to 70-fold was demonstrated by embedding erbium ions in a Fabry-Perot resonator 45 .…”

Section: Optical Propertiesmentioning

confidence: 99%

An L-band emitter with quantum memory in silicon

et al. 2022

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Fluorescent centres in silicon have recently attracted great interest, owing to their remarkable properties for quantum technology. Here, we demonstrate that the C-centre in silicon can realise an optically readable quantum register in the L-band wavelength region where the transmission losses in commercial optical fibres are minimal. Our in-depth theoretical characterisation confirms the assignment of the C-centre to the carbon-oxygen interstitial pair defect. We further explore its magneto-optical properties, such as hyperfine and spin-orbit coupling constants from first principles calculations, which are crucial for tight control of the quantum states of the triplet electron spin. Based on this data, we set up quantum optics protocols to initialise and read out the quantum states of the electron spin, and realise a quantum memory by transferring quantum information from the electron spin to proximate 29Si nuclear spins. Our findings establish an optically readable long-living quantum memory in silicon where the scalability of qubits may be achieved by CMOS-compatible technology.

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“…Among them, the T-center has enabled spinresolved detection in a nanostructured material [19], and an increase of the fluorescence of an ensemble of Gcenters has been observed upon integration into nanophotonic ring resonators [20]. The second approach, followed in this work, is the use of single erbium dopants in silicon [21], which can exhibit narrow inhomogeneous linewidth [22,23] and long optical coherence at a temperature of 4 K even in nanophotonic waveguides [24].…”

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confidence: 99%

mentioning

confidence: 99%

“…In our experiment, we integrate erbium at a recently discovered site B [24] that combines a radiative lifetime that is shorter than in any other known host material (186 µs) with narrow inhomogeneous (∼ 0.5 GHz) and homogeneous (≤ 0.01 MHz) linewidths and a large splitting of the crystal field levels. The sample fabrication is outlined in [24]. In short, we start with a chip obtained by chemical vapor deposition on a thin silicon-on-insulator wafer that is implanted at ∼ 800 K with erbium to a peak concentration of 0.2 × 10 18 cm −3 and then diced in 10 × 10mm 2 pieces.…”

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confidence: 99%

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Purcell enhancement of single photon emitters in silicon

Gritsch¹,

Ulanowski²,

Reiserer³

2023

Preprint

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Individual spins that are coupled to telecommunication photons offer unique promise for distributed quantum information processing once a coherent and efficient spin-photon interface can be fabricated at scale. We implement such an interface by integrating erbium dopants into a nanophotonic silicon resonator. We achieve spin-resolved excitation of individual emitters with < 0.1 GHz spectral diffusion linewidth. Upon resonant driving, we observe optical Rabi oscillations and singlephoton emission with a 60-fold Purcell enhancement. Our results establish a promising new platform for quantum networks.

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Narrow Optical Transitions in Erbium-Implanted Silicon Waveguides

Cited by 26 publications

References 52 publications

Fluorescence enhancement via lossless all-dielectric spherical mesocavities

Fluorescence enhancement via lossless all-dielectric spherical mesocavities

An L-band emitter with quantum memory in silicon

Purcell enhancement of single photon emitters in silicon

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