Revealing the dark side of a bright exciton–polariton condensate

Ménard, Jean‐Michel; Poellmann, C.; Porer, M.; Leierseder, U.; Galopin, Élisabeth; Lemaı̂tre, A.; Amo, A.; Bloch, J.; Huber, Rupert

doi:10.1038/ncomms5648

Cited by 58 publications

(47 citation statements)

References 29 publications

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“…This can be simply explained by examining the terms in the formula (4). The 1s state is strongly energetically separated from excited states according to the formula E n ∼ (n − 1/2) −2 valid for the 2D hydrogen atom, which gives the ratio 1:9 between the energy of the 1s and 2s states.…”

Section: Theoretical Modelmentioning

confidence: 99%

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2s exciton-polariton revealed in an external magnetic field

et al. 2017

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We demonstrate the existence of the excited state of an exciton-polariton in a semiconductor microcavity. The strong coupling of the quantum well heavy-hole exciton in an excited 2s state to the cavity photon is observed in non-zero magnetic field due to surprisingly fast increase of Rabi energy of the 2s exciton-polariton in magnetic field. This effect is explained by a strong modification of the wave-function of the relative electron-hole motion for the 2s exciton state.

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Section: Theoretical Modelmentioning

confidence: 99%

“…Recent interest in higher excited state excitonic ladder in a microcavity [4] motivated us to demonstrate the strong coupling of the 2s excited state of the exciton to cavity photons. We observe a strong increase of the 2s exciton -cavity photon coupling strength in magnetic field.…”

Section: Introductionmentioning

confidence: 99%

2s exciton-polariton revealed in an external magnetic field

et al. 2017

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“…From there, one can either use the Langreth rules on Eq. (25) to calculate the retarded and advanced SEs, or proceed as explained in Sec. .…”

Section: Electron Green's Functionsmentioning

confidence: 99%

“…PACS numbers: 05.60. Gg, 42.50.Pq, 74.40.Gh, The study of strong light-matter interactions [1][2][3][4] is playing an increasingly crucial role in understanding as well as engineering new states of matter with relevance to the fields of quantum optics [5][6][7][8][9][10][11][12][13][14][15][16][17][18], solid state physics [19][20][21][22][23][24][25][26][27][28][29][30][31], as well as quantum chemistry [32][33][34][35][36] and material science [37][38][39][40][41][42][43][44][45][46][47][48][49][...…”

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confidence: 99%

Cavity-Enhanced Transport of Charge

et al. 2017

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We theoretically investigate charge transport through electronic bands of a mesoscopic onedimensional system, where inter-band transitions are coupled to a confined cavity mode, initially prepared close to its vacuum. This coupling leads to light-matter hybridization where the dressed fermionic bands interact via absorption and emission of dressed cavity-photons. Using a selfconsistent non-equilibrium Green's function method, we compute electronic transmissions and cavity photon spectra and demonstrate how light-matter coupling can lead to an enhancement of charge conductivity in the steady-state. We find that depending on cavity loss rate, electronic bandwidth, and coupling strength, the dynamics involves either an individual or a collective response of Bloch states, and explain how this affects the current enhancement. We show that the charge conductivity enhancement can reach orders of magnitudes under experimentally relevant conditions. PACS numbers: 05.60. Gg, 42.50.Pq, 74.40.Gh, The study of strong light-matter interactions [1][2][3][4] is playing an increasingly crucial role in understanding as well as engineering new states of matter with relevance to the fields of quantum optics [5][6][7][8][9][10][11][12][13][14][15][16][17][18], solid state physics [19][20][21][22][23][24][25][26][27][28][29][30][31], as well as quantum chemistry [32][33][34][35][36] and material science [37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53]. An emerging topic of interest is the modification of material properties using either external electro-magnetic radiation [54][55][56] or spatially confined modes such as in cavity quantum electrodynamics [57][58][59][60][61][62][63]. Recent experiments with organic semiconductors have demonstrated a dramatic enhancement of charge conductivity when molecules interact strongly with a surface plasmon mode [64]. In principle, this can open up exciting new opportunities both for basic science and applications of organic electronics [65]. The microscopic mechanisms leading to charge conductivity enhancement, however, remain today largely unexplained. In this work, we propose a proof-of-principle model that sheds light on the physical mechanisms behind current enhancement due to the interaction with a confined bosonic mode. We show that our model can lead to a dramatic current enhancement by orders of magnitude for certain conditions that can be relevant to typical experiments across fields.The setup we consider [see Fig. 1(a)] consists of a mesoscopic chain of N sites with two orbitals of energy ω 1 and ω 2 ( = 1) in a 1D geometry, forming two bands in a tight-binding picture. The edges of the chain are connected to a source and a drain with a bias voltage across, respectively inserting and removing (spin-less) electrons in the two orbitals at rates Γ 1 and Γ 2 . The on-site interband transitions with energy ω 21 = ω 2 −ω 1 are resonantly coupled to a cavity mode with coupling strength g and loss rate κ. Initially, we only allow electrons in the upper band to hop with a ...

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“…In order to be effective for the feedback, this should be of a similar order or faster than the coherence times for polaritons. This can be considerably longer than the lifetime of the polaritons themselves, being also in nanosecond scale [44][45][46]. The exciton-polaritons are excited coherently and resonantly with a pump laser in the zero in-plane momentum direction (perpendicular to the QWs).…”

Section: Proposed Experimental Systemmentioning

confidence: 99%

Steady-state generation of negative-Wigner-function light using feedback

Joana¹,

Loock²,

Deng³

et al. 2016

Phys. Rev. A

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We propose a method of producing steady-state coherent light with negative Wigner functions in nonlinear media combined with feedback control. While the nonlinearities are essential to produce the Wigner negativities, this alone is insufficient to stabilize steady-state light with negativities. Using feedback control to control the phase in the cavity we find that this produces significant total negativities for reasonable experimental parameters. The negative Wigner function is produced continuously and does not appear to be restricted to low amplitude light. The technique is applicable to systems such as exciton-polaritons, where strong natural nonlinearities are present.

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Revealing the dark side of a bright exciton–polariton condensate

Cited by 58 publications

References 29 publications

2s exciton-polariton revealed in an external magnetic field

2s exciton-polariton revealed in an external magnetic field

Cavity-Enhanced Transport of Charge

Steady-state generation of negative-Wigner-function light using feedback

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