Modulated Rashba-Dresselhaus Spin-Orbit Coupling for Topology Control and Analog Simulations

Kokhanchik, P.; Solnyshkov, D. D.; Stöferle, Thilo; Piętka, B.; Szczytko, Jacek; Malpuech, Guillaume

doi:10.1103/physrevlett.129.246801

Cited by 4 publications

(4 citation statements)

References 79 publications

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“…3c, where we plot the normalized density of eigenstates versus the lattice site number. In the Hermitian limit (γ → 0), the origin of the topological transition related to the formation of the edge states is the modulation of the tunneling amplitudes by the combination of RDSOC β with the in-plane field δ, as described in our previous paper [67]. Here, this transition is modified by non-Hermiticity and described by the invariant ν plotted in the top panel of Fig.…”

mentioning

confidence: 77%

“…[67]), in analogy with the Harper-Hofstadter model [68,69] or Aharonov-Bohm effect [70,71]. The new ingredient here is the on-site spin lifetime imbalance which was absent in our previous work [67] and which makes the Hamiltonian non-Hermitian. The average lifetime is not included in the Hamiltonian and would only lead to a global decay of modes.…”

mentioning

confidence: 82%

“…The RD-SOC can be represented as a constant gauge potential that enters the tunneling coefficient as a spin-dependent phase β σz (see details in Ref. [67]), in analogy with the Harper-Hofstadter model [68,69] or Aharonov-Bohm effect [70,71]. The new ingredient here is the on-site spin lifetime imbalance which was absent in our previous work [67] and which makes the Hamiltonian non-Hermitian.…”

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confidence: 98%

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Non-Hermitian skin effect induced by Rashba-Dresselhaus spin-orbit coupling

Kokhanchik¹,

Solnyshkov²,

Malpuech³

2023

Preprint

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confidence: 77%

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confidence: 82%

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confidence: 98%

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Non-Hermitian skin effect induced by Rashba-Dresselhaus spin-orbit coupling

Kokhanchik¹,

Solnyshkov²,

Malpuech³

2023

Preprint

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“…The same etching techniques to trap polaritons can be used to realize lattices for polaritons. This has supported the field of topological polaritons [44][45][46][47][48][49][50][51][52], where the typical objective is to engineer a band structure such that it isolates a small number of states in a band gap using topology to ensure robustness against structural variations and disorder. Being non-Hermitian systems, polaritons also support a variety of non-Hermitian topological effects, including exceptional points [53][54][55], bound-statein-continuum modes [56], NHSE [57][58][59][60], non-Hermitian corner modes [61], and endmode lasing [62].…”

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confidence: 99%

Topological enhancement of exciton-polariton coherence with non-Hermitian morphing

Bao,

Xu,

Verstraelen

et al. 2023

Phys. Rev. B

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The non-Hermitian skin effect (NHSE) has been intensely investigated over the past few years and has unveiled new topological phases, which have no counterparts in Hermitian systems. Here we consider the hybridization between the NHSE in an exciton-polariton waveguide and a localized defect mode. By tuning the non-Hermiticity, we find that the resulting ground state of the system is both spatially extended and energetically separated from other modes in the system. When polariton lasing occurs in the system, we find an enhanced spatial coherence (of typically 30 times longer) compared to regular waveguides, which is robust in the presence of disorder.

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Electrically Tunable Spin‐Orbit Coupled Photonic Lattice in a Liquid Crystal Microcavity

Muszyński,

Oliwa,

Kokhanchik

et al. 2024

Laser & Photonics Reviews

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A 1D photonic crystal is created with strong polarization dependence and tunable by an applied electric field. This is accomplished in a planar microcavity by embedding a cholesteric liquid crystal (LC), which spontaneously forms a uniform lying helix (ULH). The applied voltage controls the orientation of the LC molecules and, consequently, the strength of a polarization‐dependent periodic potential. It leads to opening or closing of photonic bandgaps in the dispersion of the massive photons in the microcavity. In addition, when the ULH structure possesses a molecular tilt, it induces a spin‐orbit coupling between the lattice bands of different parity. This interband spin‐orbit coupling (ISOC) is analogous to optical activity and can be treated as a synthetic non‐Abelian gauge potential. Finally, it is showed that doping the LC with dyes allows us to achieve lasing that inherits all the above‐mentioned tunable properties of LC microcavity, including dual and circularly‐polarized lasing.

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Modulated Rashba-Dresselhaus Spin-Orbit Coupling for Topology Control and Analog Simulations

Cited by 4 publications

References 79 publications

Non-Hermitian skin effect induced by Rashba-Dresselhaus spin-orbit coupling

Non-Hermitian skin effect induced by Rashba-Dresselhaus spin-orbit coupling

Topological enhancement of exciton-polariton coherence with non-Hermitian morphing

Electrically Tunable Spin‐Orbit Coupled Photonic Lattice in a Liquid Crystal Microcavity

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