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Helgi Sigurðsson - Research Specialist

Helgi Sigurðsson

–

School of Engineering and Natural Sciences

Helgi Sigurðsson

Research Specialist

Postdoctoral researcher

Location
VR-3 / V03-208
Email
helg [at] hi.is

Unit
The Institute of Physical Sciences, Physics Division

Curriculum Vitae
Helgi Sigurðsson - Curriculum Vitae
ORCID site
https://orcid.org/0000-0002-4156-4414
Research portal – Helgi Sigurðsson

Published works

2024

Occupancy-driven Zeeman suppression and inversion in trapped polariton condensatesPhysical Review B
Reconfigurable quantum fluid molecules of bound states in the continuumNature Physics
Dirac exciton–polariton condensates in photonic crystal gratingsNanophotonics
Vortex clusters in a stirred polariton condensatePhysical Review B
All-optical triangular and honeycomb lattices of exciton–polaritonsApplied Physics Letters

2023

Reservoir microlensing in polariton condensatesOptics of Excitons in confined systems, Lecce, Italy, 12/06/23
Polariton vortex Chern insulator [Invited]Optical Materials Express
Quantum vortex formation in the "rotating bucket" experiment with polariton condensatesScience Advances
Minor embedding with Stuart-Landau oscillator networksPhysical Review Research
Directional planar antennae in polariton condensatesApplied Physics Letters
Next nearest neighbour coupling in polariton condensatesOptics of Excitons in confined systems, Lecce, Italy, 12/06/23
Magneto-optical induced supermode switching in quantum fluids of lightCommunications Physics
Next-nearest-neighbor coupling with spinor polariton condensatesPhysical Review B

2022

Screening nearest-neighbor interactions in networks of exciton-polariton condensates through spin orbit couplingPhysical Review B
Persistent Self-Induced Larmor Precession Evidenced through Periodic Revivals of CoherencePhysical Review Letters
Solving the max-3-cut problem with coherent networksPhysical Review Applied
Enhanced coupling between ballistic exciton-polariton condensates through tailored pumpingPhysical Review B
Electrically tunable Berry curvature and strong light-matter coupling in liquid crystal microcavities with 2D perovskiteScience Advances
Enhanced coupling between ballistic exciton-polariton condensates through tailored pumpingPhysical Review B
Solving the Max-3-Cut Problem with Coherent NetworksPhysical Review Applied
All-optical artificial vortex matter in quantum fluids of lightArXiv
Machine learning of phase transitions in nonlinear polariton latticesCommunications Physics
Engineering Photon Statistics in a Spinor Polariton CondensatePhysical Review Letters
Machine learning of phase transitions in nonlinear polariton latticesCommunications Physics
Persistent self-induced Larmor precession evidenced through periodic revivals of coherencePhysical Review Letters
Spontaneous formation of time-periodic vortex cluster in nonlinear fluids of lightPhysical Review Letters

2021

Polariton spin jets through optical controlPhysical Review B
Reservoir optics with exciton-polariton condensatesPhysical Review B
All-Optical Linear-Polarization Engineering in Single and Coupled Exciton-Polariton CondensatesPhysical Review Applied
Photonic Berry curvature in double liquid crystal microcavities with broken inversion symmetryPhysical Review B
Observation of second-order meron polarization textures in optical microcavitiesOptica
Geometric frustration in polygons of polariton condensates creating vortices of varying topological chargeNature Communications
Optically controlled polariton condensate moleculesPhysical Review B
Engineering spatial coherence in lattices of polariton condensatesOptica
Geometric frustration in polygons of polariton condensates creating vortices of varying topological chargeNature Communications
All-Optical Linear-Polarization Engineering in Single and Coupled Exciton-Polariton CondensatesPhysical Review Applied
Quantum fluids of light in all-optical scatterer latticesNature Communications
Quantum fluids of light in all-optical scatterer latticesNature Communications
Photonic Berry curvature in double liquid crystal microcavities with broken inversion symmetryPhysical Review B
Realizing Optical Persistent Spin Helix and Stern-Gerlach Deflection in an Anisotropic Liquid Crystal MicrocavityPhysical Review Letters
Optically controlled polariton condensate moleculesPhysical Review B
Reservoir optics with exciton-polariton condensatesPhysical Review B
Polariton spin jets through optical controlPhysical Review B
Realizing optical persistent spin helix and stern-gerlach deflection in an anisotropic liquid crystal microcavityPhysical Review Letters

2020

Time-delay polaritonicsCommunications Physics
Optical orientation, polarization pinning, and depolarization dynamics in optically confined polariton condensatesPhysical Review B
Synthetic band-structure engineering in polariton crystals with non-Hermitian topological phasesNature Communications
Synchronization in optically trapped polariton Stuart-Landau networksPhysical Review B
Time-delay polaritonicsCommunications Physics
Lotka-Volterra population dynamics in coherent and tunable oscillators of trapped polariton condensatesPhysical Review B
Synchronization in optically trapped polariton Stuart-Landau networksPhysical Review B
Optical Control of Couplings in Polariton Condensate LatticesPhysical Review Letters
Synthetic band-structure engineering in polariton crystals with non-Hermitian topological phasesNature Communications
Lotka-Volterra population dynamics in coherent and tunable oscillators of trapped polariton condensatesPhysical Review B
Synchronization in optically trapped polariton Stuart-Landau networksPhysical Review B
Hysteresis in linearly polarized nonresonantly driven exciton-polariton condensatesPhysical Review Research
Pseudo-spin destabilization in optically confined exciton-polariton condensatesOptics InfoBase Conference Papers
Optical Control of Couplings in Polariton Condensate LatticesPhysical Review Letters
Optical orientation, polarization pinning, and depolarization dynamics in optically confined polariton condensatesPhysical Review B
Hysteresis in linearly polarized nonresonantly driven exciton-polariton condensatesPhysical Review Research
Optical orientation, polarization pinning, and depolarization dynamics in optically confined polariton condensatesPhysical Review B

2019

Observation of inversion, hysteresis, and collapse of spin in optically trapped polariton condensatesPhysical Review B
Observation of inversion, hysteresis, and collapse of spin in optically trapped polariton condensates
Optical control of coupling in phase-locked polariton dyadsOptics InfoBase Conference Papers
Probabilistic solving of NP-hard problems with bistable nonlinear optical networksPhysical Review B
All-to-All Intramodal Condensate Coupling by Multifrequency Excitation of PolaritonsACS Photonics
Optically trapped polariton condensates as semiclassical time crystalsPhysical Review A
Spontaneous topological transitions in a honeycomb lattice of exciton-polariton condensates due to spin bifurcationsPhysical Review B
Observation of inversion, hysteresis, and collapse of spin in optically trapped polariton condensatesPhysical Review B
Optical control of coupling in phase-locked polariton dyadsConference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
Amplification of nonlinear polariton pulses in waveguidesOptics Express
Spontaneous topological transitions in a honeycomb lattice of exciton-polariton condensates due to spin bifurcationsPhysical Review B
Probabilistic solving of
NP
-hard problems with bistable nonlinear optical networks
Probabilistic solving of NP -hard problems with bistable nonlinear optical networksPhysical Review B

2018

Parity bifurcations in trapped multistable phase locked exciton-polariton condensatesPhysical Review B
Spin Domains in One-Dimensional Conservative Polariton SolitonsACS Photonics
Parity bifurcations in trapped multistable phase locked exciton-polariton condensatesPhysical Review B
Transition from Propagating Polariton Solitons to a Standing Wave Condensate Induced by InteractionsPhysical Review Letters

2017

Driven-dissipative spin chain model based on exciton-polariton condensatesPhys. Rev. B
Spontaneous and superfluid chiral edge states in exciton-polariton condensatesPhys. Rev. B
Spin Order and Phase Transitions in Chains of Polariton CondensatesPhys. Rev. Lett.
Parity solitons in nonresonantly driven-dissipative condensate channelsPhys. Rev. B
Electrical and optical switching in the bistable regime of an electrically injected polariton laserPhys. Rev. B

2016

Half-skyrmion spin textures in polariton microcavitiesPhys. Rev. B

2015

Aharonov-Bohm effect for excitons in a semiconductor quantum ring dressed by circularly polarized lightPhysical Review B - Condensed Matter and Materials Physics
Aharonov-Bohm effect induced by circularly polarized lightSuperlattices and Microstructures
Polariton spin whirlsPhysical Review B - Condensed Matter and Materials Physics
Switching waves in multilevel incoherently driven polariton condensatesPhysical Review B - Condensed Matter and Materials Physics

2014

Optically induced Aharonov-Bohm effect in mesoscopic ringsPhysical Review B - Condensed Matter and Materials Physics
Information processing with topologically protected vortex memories in exciton-polariton condensatesPhysical Review B - Condensed Matter and Materials Physics
Vortices in spinor cold exciton condensates with spin-orbit interactionPhysical Review B - Condensed Matter and Materials Physics

Keywords for Specialisation:

Exciton-polariton

Two-dimensional electron systems

Macroscopic quantum physics

Semiconductor microcavities