1,720,960 research outputs found
Data for: Polariton spin jets through optical control
No full textExperimental data and simulation results used to create the figures in the paper: Pickup, L., Töpfer, J.D., Sigurdsson, H. & Lagoudakis, P. G. (2021) Polariton spin jets through optical control. Physical Review B.</span
Data for Time-Delay Polaritonics
No full textExperimental data and numerical simulation results used to create the figures in the paper Töpfer, J.D., Sigurdsson, H., Pickup, L. & Lagoudakis, P. (2019). Time-Delay Polaritonics. Communications Physics.</span
Data for Synthetic band-structure engineering in polariton crystals with non-Hermitian topological phases
No full textExperimental data and numerical simulation results used to create the figures in the paper Pickup, L., Sigurdsson, H., Ruostekoski, J. & Lagoudakis, P. (2020) Synthetic band-structure engineering in polariton crystals with non-Hermitian topological phases. Nature Communications.</span
Next nearest neighbour coupling with spinor polariton condensates
Full text linkWe report on experimental observation of next-nearest-neighbour coupling between ballistically expanding spinor exciton-polariton condensates in a planar semiconductor microcavity. All-optical control over the coupling strength between neighbouring condensates is demonstrated through distance-periodic pseudospin screening of their ballistic particle outflow due to the inherent splitting of the planar cavity transverse-electric (TE) and transverse-magnetic (TM) modes. By screening the nearest-neighbour coupling we overcome the conventional spatial coupling hierarchy between condensates. This offers a promising route towards creating unconventional non-planar many-body Hamiltonians using networks of ballistically expanding spinor exciton-polariton condensates.10 pages, 4 figure
Persistent self-induced Larmor precession evidenced through periodic revivals of coherence
No full textInterferometric measurements of an optically trapped exciton-polariton condensate reveal a regime where the condensate pseudo-spin precesses persistently within the driving optical pulse. For a single 20 μs optical pulse, the condensate pseudo-spin undergoes over 105 full precessions with striking frequency stability. The emergence of the precession is traced to polariton nonlinear interactions that give rise to a self-induced out-of-plane magnetic field, which in turn drives the system spin dynamics. The Larmor precession frequency and trajectory are directly influenced by the condensate density, enabling the control of this effect with optical means. Our results accentuate the system's potential for the realization of magnetometry devices and can lead to the emergence of spin-squeezed polariton condensates.</p
Data for Optical bistability under non-resonant excitation in spinor polariton condensates
No full textExperimental data and numerical simulation results used to create the figures in the paper Pickup, L., Kalinin, K., Askitopoulos, A. M., Hatzopoulos, Z., Savvidis, P. G., Berloff, N. G., & Lagoudakis, P. (2018). Optical bistability under nonresonant excitation in spinor polariton condensates. Physical Review Letters.
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Data to support the article "Persistent self-induced Larmor precession evidenced through periodic revivals of coherence"
No full textData from experimental measurements and numerical simulations used to create the figures in the paper Sigurdsson, H., Gnusov, I., Alyatkin, S., Pickup, L., Gippius, N.A., Lagoudakis, P.G. & Askitopoulos, A. (2022) "Persistent self-induced Larmor precession evidenced through periodic revivals of coherence" in Physical Review Letters.</span
Optical bistability under nonresonant excitation in spinor polariton condensates
No full textWe realise bistability in the spinor of polariton condensates under non-resonant optical excitation and in the absence of biasing external fields. Numerical modelling of the system using the GinzburgLandau equation with an internal Josephson coupling between the two spin components of the condensate qualitatively describes the experimental observations. We demonstrate that polariton spin bistability strongly depends on the condensate’s overlap with the exciton reservoir by tuning the excitation geometry and sample temperature. We obtain non-collapsing bistability hysteresis loops for a record range of sweep times, [10µs, 1s], offering a promising route to spin switches and spin memory elements.<br/
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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