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Helgi Sigurðsson - Research Specialist

Helgi Sigurðsson

–

School of Engineering and Natural Sciences

Helgi SigurðssonHann/Hans

Research Specialist

Research Specialist

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

Unit
The Institute of Physical Sciences, Physics Division
Website
https://www.liquid-light.fuw.edu.pl/

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
Dirac exciton–polariton condensates in photonic crystal gratingsNanophotonics
Chiral and edge-lasing with perovskite crystals of arbitrary shape
Vortex clusters in a stirred polariton condensatePhysical Review B
All-optical triangular and honeycomb lattices of exciton–polaritonsApplied Physics Letters
Antiferromagnetic Ising model in a triangular vortex lattice of quantum fluids of lightScience advances
Versatile perovskites enable room-temperature topological polaritonicsNature Nanotechnology
Non-Hermitian polariton–photon coupling in a perovskite open microcavityNanophotonics
Reconfigurable quantum fluid molecules of bound states in the continuumNature Physics
Predesigned perovskite crystal waveguides for room-temperature exciton–polariton condensation and edge lasingNature Materials
Observation of spin precession resonance in a stirred quantum fluid of lightOptica

2023

Directional planar antennae in polariton condensatesApplied Physics Letters
Magneto-optical induced supermode switching in quantum fluids of lightCommunications Physics
Minor embedding with Stuart-Landau oscillator networksPhysical Review Research
Reservoir microlensing in polariton condensates
Quantum vortex formation in the “rotating bucket” experiment with polariton condensatesScience advances
Polariton vortex Chern insulator [Invited]Optical Materials Express
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
Machine learning of phase transitions in nonlinear polariton latticesCommunications Physics
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
Engineering Photon Statistics in a Spinor Polariton CondensatePhysical Review Letters
Spontaneous Formation of Time-Periodic Vortex Cluster in Nonlinear Fluids of LightPhysical Review Letters
Persistent Self-Induced Larmor Precession Evidenced through Periodic Revivals of CoherencePhysical Review Letters
Solving the max-3-cut problem with coherent networksPhysical Review Applied

2021

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

2020

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

2019

Observation of inversion, hysteresis, and collapse of spin in optically trapped polariton condensatesPhysical Review B
Spontaneous topological transitions in a honeycomb lattice of exciton-polariton condensates due to spin bifurcationsPhysical Review B
Optical control of coupling in phase-locked polariton dyads
All-to-All Intramodal Condensate Coupling by Multifrequency Excitation of PolaritonsACS Photonics
Probabilistic solving of NP -hard problems with bistable nonlinear optical networksPhysical Review B
Amplification of nonlinear polariton pulses in waveguidesOptics Express
Optically trapped polariton condensates as semiclassical time crystalsPhysical Review A

2018

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

Parity solitons in nonresonantly driven-dissipative condensate channelsPhysical Review B
Spontaneous and superfluid chiral edge states in exciton-polariton condensatesPhysical Review B
Electrical and optical switching in the bistable regime of an electrically injected polariton laserPhysical Review B
Driven-dissipative spin chain model based on exciton-polariton condensatesPhysical Review B
Spin Order and Phase Transitions in Chains of Polariton CondensatesPhysical Review Letters

2016

Half-skyrmion spin textures in polariton microcavitiesPhysical Review B

2015

Switching waves in multilevel incoherently driven polariton condensatesPhysical 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
Aharonov-Bohm effect for excitons in a semiconductor quantum ring dressed by circularly polarized lightPhysical 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