Site-controlled quantum dots coupled to a photonic crystal molecule

Rigal, B.; Jarlov, C.; Gallo, Pascal; Dwir, B.; Rudra, A.; Calic, M.; Kapon, E.

doi:10.1063/1.4932228

Cited by 16 publications

(8 citation statements)

References 25 publications

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“…These observations were reproduced by a theoretical model that accounts for QD phonon scattering and pure dephasing decoherence mechanisms, from which a QD-cavity coupling strength g = 50 μeV was extracted for both QDs. The present Letter consolidates the potential of site-controlled QDs as a scalable platform for realizing more advanced cavity QED schemes, such as multiple QDs in a cavity 31 , coupled cavity structures 32 and waveguide-coupled distant cavities 33 .…”

Section: Discussionsupporting

confidence: 58%

Deterministic radiative coupling of two semiconductor quantum dots to the optical mode of a photonic crystal nanocavity

Calic

Jarlov

Gallo

et al. 2017

Sci Rep

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A system of two site-controlled semiconductor quantum dots (QDs) is deterministically integrated with a photonic crystal membrane nano-cavity. The two QDs are identified via their reproducible emission spectral features, and their coupling to the fundamental cavity mode is established by emission co-polarization and cavity feeding features. A theoretical model accounting for phonon interaction and pure dephasing reproduces the observed results and permits extraction of the light-matter coupling constant for this system. The demonstrated approach offers a platform for scaling up the integration of QD systems and nano-photonic elements for integrated quantum photonics applications.

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Section: Discussionsupporting

confidence: 58%

Deterministic radiative coupling of two semiconductor quantum dots to the optical mode of a photonic crystal nanocavity

Calic

Jarlov

Gallo

et al. 2017

Sci Rep

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“…The observed ultrauniform emission across the entire array is nearly an order-of-magnitude improvement on the typically reported 3D island QDs 2, 25 and the droplet QDs 26 . It is, to the best of our knowledge, the narrowest spectral emission reported for ordered QD arrays [27][28][29] .…”

Section: Spectrally Ultra-uniform and Ultra-pure Single Photon Source...mentioning

confidence: 80%

Planarized spatially-regular arrays of spectrally uniform single quantum dots as on-chip single photon sources for quantum optical circuits

et al. 2020

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A long standing obstacle to realizing highly sought on-chip monolithic solid state quantum optical circuits has been the lack of a starting platform comprising buried (protected) scalable spatially ordered and spectrally uniform arrays of on-demand single photon sources (SPSs). In this paper we report the first realization of such SPS arrays based upon a class of single quantum dots (SQDs) with single photon emission purity > 99.5% and uniformity < 2nm. Such SQD synthesis approach offers rich flexibility in material combinations and thus can cover the emission wavelength regime from long-to mid-to near-infrared to the visible and ultraviolet. The buried array of SQDs naturally lend themselves to the fabrication of quantum optical circuits employing either the well-developed photonic 2D crystal platform or the use of Mie-like collective resonance of all-dielectric building block based metastructures designed for directed emission and manipulation of the emitted photons in the horizontal planar architecture inherent to on-chip optical circuits. Finite element method-based simulations of the Mie-resonance based manipulation of the emitted light are presented showing achievement of simultaneous multifunctional manipulation of photons with large spectral bandwidth of ~ 20nm that eases spectral and mode matching. Our combined experimental and simulation findings presented here open the pathway for fabrication and study of on-chip quantum optical circuits.

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“…Perhaps the most successful approach is represented by the self-limited growth of QDs into inverted pyramidal holes etched in a GaAs substrate 12,13 . This approach gave a record-low inhomogeneous emission broadening of 1.4 meV 14 , and it was used for the integration of sitecontrolled QDs with PhC cavities, showing weak coupling [15][16][17][18] . QDs grown in larger pyramids (with typical size of 7.5 µm), not integrable in PhC cavities, have reached a very good homogeneous broadening of 10 µeV 19 .…”

mentioning

confidence: 99%

Site‐Controlled Single‐Photon Emitters Fabricated by Near‐Field Illumination

et al. 2018

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Many of the most advanced applications of semiconductor quantum dots (QDs) in quantum information technology require a fine control of the QDs' position and confinement potential, which cannot be achieved with conventional growth techniques. Here, a novel and versatile approach for the fabrication of site-controlled QDs is presented. Hydrogen incorporation in GaAsN results in the formation of N-2H and N-2H-H complexes, which neutralize all the effects of N on GaAs, including the N-induced large reduction of the bandgap energy. Starting from a fully hydrogenated GaAs/GaAsN:H/GaAs quantum well, the NH bonds located within the light spot generated by a scanning near-field optical microscope tip are broken, thus obtaining site-controlled GaAsN QDs surrounded by a barrier of GaAsN:H (laterally) and GaAs (above and below). By adjusting the laser power density and exposure time, the optical properties of the QDs can be finely controlled and optimized, tuning the quantum confinement energy over more than 100 meV and resulting in the observation of single-photon emission from both the exciton and biexciton recombinations. This novel fabrication technique reaches a position accuracy <100 nm and it can easily be applied to the realization of more complex nanostructures.

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Site-controlled quantum dots coupled to a photonic crystal molecule

Cited by 16 publications

References 25 publications

Deterministic radiative coupling of two semiconductor quantum dots to the optical mode of a photonic crystal nanocavity

Deterministic radiative coupling of two semiconductor quantum dots to the optical mode of a photonic crystal nanocavity

Planarized spatially-regular arrays of spectrally uniform single quantum dots as on-chip single photon sources for quantum optical circuits

Site‐Controlled Single‐Photon Emitters Fabricated by Near‐Field Illumination

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