Manipulating polariton condensates by Rashba-Dresselhaus coupling at room temperature

Li, Yao; Ma, Xuekai; Zhai, Xiaokun; Gao, Meini; Dai, Haitao; Schumacher, Stefan; Gao, Tingge

doi:10.1038/s41467-022-31529-4

Cited by 35 publications

(18 citation statements)

References 41 publications

(38 reference statements)

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“…In this regime, the photonic Hamiltonian can be written astrueĤϕRDfalse(boldk,normalθfalse)=trueĤϕfalse(boldk,normalθfalse)−2normalαkytrueσ̂ywhere α is the strength of the RD SOC. Note that, in this low-energy regime, polariton and photon lasing was recently demonstrated ( 51 , 52 ).…”

Section: Resultsmentioning

confidence: 68%

“…where  is the strength of the RD SOC. Note that, in this low-energy regime, polariton and photon lasing was recently demonstrated (51,52).…”

Section: Rd Polaritonsmentioning

confidence: 77%

“…We note that both electrically pumped polariton lasers ( 60 ) and electro-optic–modulated polariton topological lasers ( 61 ) are already possible at cryogenic temperatures. Moreover, with already exciting work aimed at RD polariton condensation ( 51 ), we expect that our platform can serve as a testbed for driven dissipative quantum matter in unconventional artificial gauge fields.…”

Section: Discussionmentioning

confidence: 99%

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Electrically tunable Berry curvature and strong light-matter coupling in liquid crystal microcavities with 2D perovskite

et al. 2022

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The field of spinoptronics is underpinned by good control over photonic spin-orbit coupling in devices that have strong optical nonlinearities. Such devices might hold the key to a new era of optoelectronics where momentum and polarization degrees of freedom of light are interwoven and interfaced with electronics. However, manipulating photons through electrical means is a daunting task given their charge neutrality. In this work, we present electrically tunable microcavity exciton-polariton resonances in a Rashba-Dresselhaus spin-orbit coupling field. We show that different spin-orbit coupling fields and the reduced cavity symmetry lead to tunable formation of the Berry curvature, the hallmark of quantum geometrical effects. For this, we have implemented an architecture of a photonic structure with a two-dimensional perovskite layer incorporated into a microcavity filled with nematic liquid crystal. Our work interfaces spinoptronic devices with electronics by combining electrical control over both the strong light-matter coupling conditions and artificial gauge fields.

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Section: Resultsmentioning

confidence: 68%

“…where  is the strength of the RD SOC. Note that, in this low-energy regime, polariton and photon lasing was recently demonstrated (51,52).…”

Section: Rd Polaritonsmentioning

confidence: 77%

Section: Discussionmentioning

confidence: 99%

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Electrically tunable Berry curvature and strong light-matter coupling in liquid crystal microcavities with 2D perovskite

et al. 2022

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“…Utilizing a molecular LC inserted into the microcavity, the refractive index of the cavity layer can be easily tuned by electrically controlling the LC molecular director. As a consequence, the anisotropic photonic or polariton mode can be manipulated [19,20].…”

mentioning

confidence: 99%

“…The polariton dispersions are fitted by using a coupled oscillator model and the details are shown in Table S1. The electric field rotates the LC molecule director, so that the horizontally linearly polarized modes LP-1, LP1 and LP3 in Figure 2(a) can be tuned to higher energy, while the vertically linearly polarized modes LP0 and LP2 remain fixed [19,20].…”

mentioning

confidence: 99%

Electrically controlling vortices in a neutral exciton polariton condensate at room temperature

Zhai¹,

Ma²,

Gao³

et al. 2022

Preprint

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Manipulating bosonic condensates with electric fields is very challenging as the electric fields do not directly interact with the neutral particles of the condensate. Here we demonstrate a simple electric method to tune the vorticity of exciton polariton condensates in a strong coupling liquid crystal (LC) microcavity with CsPbBr3 microplates as active material at room temperature. In such a microcavity, the LC molecular director can be electrically modulated giving control over the polariton condensation in different modes. For isotropic non-resonant optical pumping we demonstrate the spontaneous formation of vortices with topological charges of +1, +2, -2, and -1. The topological vortex charge is controlled by a voltage in the range of 1 to 10 V applied to the microcavity sample. This control is achieved by the interplay of a built-in potential gradient, the anisotropy of the optically active perovskite microplates, and the electrically controllable LC molecular director in our system with intentionally broken rotational symmetry. Besides the fundamental interest in the achieved electric polariton vortex control at room temperature, our work paves the way to micron-sized emitters with electric control over the emitted light's phase profile and quantized orbital angular momentum for information processing and integration into photonic circuits.

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Electrically Generated Exciton Polaritons with Spin On‐Demand

Wang,

Adamo,

et al. 2024

Advanced Materials

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Generation and manipulation of exciton polaritons with controllable spin could deeply impact spintronic applications, quantum simulations, and quantum information processing, but is inherently challenging due to the charge neutrality of the polariton and the device complexity it requires. Here, electrical generation of spin‐polarized exciton polaritons in a monolithic dielectric perovskite metasurface embedded in a light‐emitting transistor is demonstrated. A finely tailored interplay of in‐ and out‐of‐plane symmetry breaking of the metasurface allows to lift the spin degeneracy through the polaritonic Rashba effect, yielding high spin purity with normalized Stokes parameter of S3 ≈ 0.8. Leveraging on spin‐momentum locking, the unique metatransistor device architecture enables electrical control of spin and directionality of the polaritonic emission. Here, the development of compact and tunable spintronic devices is advanced and an important step toward the realization of electrically pumped inversionless spin‐lasers is represented.

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Manipulating polariton condensates by Rashba-Dresselhaus coupling at room temperature

Cited by 35 publications

References 41 publications

Electrically tunable Berry curvature and strong light-matter coupling in liquid crystal microcavities with 2D perovskite

Electrically tunable Berry curvature and strong light-matter coupling in liquid crystal microcavities with 2D perovskite

Electrically controlling vortices in a neutral exciton polariton condensate at room temperature

Electrically Generated Exciton Polaritons with Spin On‐Demand

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