All-optical excitonic transistor

Kuznetsova, Y. Y.; Remeika, Mikas; High, A. A.; Hammack, A. T.; Butov, L. V.; Hanson, M.; Gossard, A. C.

doi:10.1364/ol.35.001587

Cited by 53 publications

(57 citation statements)

References 24 publications

(31 reference statements)

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“…For samples with the same layer structure, designed patterns of top electrodes create the required in-plane potential landscapes for excitons, including traps, 20 lattices, 18,23,29 ramps, 30 and circuit devices. 14,15,19,21 In this work, we use a top electrode unstructured on a large area. Such electrode creates a laterally homogeneous F z as in the experiments in Sec.…”

Section: Azimuthal and Radial Fragmentation Of The Inner Ringmentioning

confidence: 99%

“…Transport of indirect excitons was studied in a variety of potential landscapes created by applied electric fields, including ramps, 4,11,12,30 traps, 20 lattices, 18,29 moving lattices-conveyers, 23 narrow channels, 16,19,25 and circuit devices, 14,15,19,21 as well as in optically induced traps. 10,13,24,27 A set of exciton transport phenomena was observed, including the transistor effect for excitons, 14,15,19,21 localizationdelocalization transition in random potentials 7,9,10,13,17,22 and in static and moving lattices, 18,23,29 and the inner ring in emission patterns.…”

Section: Introductionmentioning

confidence: 99%

“…10,13,24,27 A set of exciton transport phenomena was observed, including the transistor effect for excitons, 14,15,19,21 localizationdelocalization transition in random potentials 7,9,10,13,17,22 and in static and moving lattices, 18,23,29 and the inner ring in emission patterns. 7,9,17,18,26,28,29,32 The studies of the latter form the subject of this work.…”

Section: Introductionmentioning

confidence: 99%

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Pattern formation in the exciton inner ring

et al. 2013

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We report on the two-beam study of indirect excitons in the inner ring in the exciton emission pattern. One laser beam generates the inner ring and a second weaker beam is positioned in the inner ring. The beam positioned in the inner ring is found to locally suppress the exciton emission intensity. We also report on the inner ring fragmentation and formation of multiple rings in the inner ring region. These features are found to originate from a weak spatial modulation of the excitation beam intensity in the inner ring region. The modulation of exciton emission intensity anticorrelates with the modulation of the laser excitation intensity. The three phenomena-inner ring fragmentation, formation of multiple rings in the inner ring region, and emission suppression by a weak laser beam in the inner ring-have a common feature: a reduction of exciton emission intensity in the region of enhanced laser excitation. This effect is explained in terms of exciton transport and thermalization.

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Section: Azimuthal and Radial Fragmentation Of The Inner Ringmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pattern formation in the exciton inner ring

et al. 2013

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“…This anomalous behaviour is consistent with the onset of strong interlayer correlations. These heterostructures may offer new routes for the exploration of a variety of e-h phenomena, including coherent circuits with minimal dissipation [25][26][27] and nanodevices including analogue-to-digital converters 28 and topologically protected quantum bits 29 .…”

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confidence: 99%

Anomalous low-temperature Coulomb drag in graphene-GaAs heterostructures

et al. 2014

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Vertical heterostructures combining different layered materials offer novel opportunities for applications and fundamental studies. Here we report a new class of heterostructures comprising a single-layer (or bilayer) graphene in close proximity to a quantum well created in GaAs and supporting a high-mobility two-dimensional electron gas. In our devices, graphene is naturally hole-doped, thereby allowing for the investigation of electron-hole interactions. We focus on the Coulomb drag transport measurements, which are sensitive to many-body effects, and find that the Coulomb drag resistivity significantly increases for temperatures o5-10 K. The low-temperature data follow a logarithmic law, therefore displaying a notable departure from the ordinary quadratic temperature dependence expected in a weakly correlated Fermi-liquid. This anomalous behaviour is consistent with the onset of strong interlayer correlations. Our heterostructures represent a new platform for the creation of coherent circuits and topologically protected quantum bits.

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“…The development of excitonic devices that control exciton fluxes is mainly concentrated on indirect excitons in coupled quantum wells (CQW) [Hagn et al, 1995;Gärtner et al, 2006;High et al, 2007;1 Vögele et al, 2009;Kuznetsova et al, 2010b;Cohen et al, 2011;Winbow et al, 2011;Schinner et al, 2011;Leonard et al, 2012] and excitonpolaritons in microcavities [Amo et al, 2010;Gao et al, 2012;Ballarini et al, 2013;Nguyen et al, 2013;Sturm et al, 2014].…”

Section: Introductionmentioning

confidence: 99%