An international research activity of state-of-the-art experimental laboratories
and theoretical modelling



In a publication in Nature Communications, researchers from Skoltech in collaboration with colleagues from Universität Wuppertal realise a cascadable NOT gate by introducing the concept of non-ground-state polariton amplification in organic semiconductor microcavities under non-resonant optical excitation. The realisation of an ultrafast universal logic gate constitutes an essential step for more complex optical circuitry that could boost information processing applications. 

Full article in Nature Communication is here.


On May 30-31 Skoltech organized a workshop “Trends in Polaritonics”. We brought together a diverse group of experts to create an educational and informative environment, as well as discussed the current directions the field was moving in. The focus was mainly on three topics: Kardar-Parisi-Zhang (KPZ) universality class, Perovskites and Gross-Pitaevskii Equation simulations.


Our paper on vortex clusters in the trapped polariton condensate is featured on the cover of Applied Physics Letters. This work opens a promising avenue for the investigation of optical vorticity properties and their applications in controllable settings.


In a paper by I. Gnusov et al., the Skoltech team with colleagues from Southampton, Warsaw and Iceland Universities, investigated formation of vortex clusters in a nonresonantly optically stirred polariton condensates. It was demonstrated that the number of vortices in the clusters scales with the optical trap energy-level (mode) into which polaritons condense. 

Full paper in Physical Review B is here.


Researchers from Skoltech led by Dr. Sergey Alyatkin, in collaboration with colleagues from University of Warsaw and Institute of Spectroscopy of Russian Academy of Sciences, report on all-optical triangular and honeycomb lattices of exciton–polaritons in their recent publication in Applied Physics Letters.


Work from the collaboration (Skoltech, University of Sheffield and Bergische Universität Wuppertal) is picked up as an "Editor's suggestion" by Physical Review Letters. A nice achievement showcasing control over the spatial profile, density, and energy of a polariton condensate at room temperature. Read more at Phys.org.


Our paper on Directional planar antennae in polariton condensates is featured on the cover of Applied Physics Letters. The article is a collaboration between Skoltech and Southampton University. This work underpins the feasibility to guide nonlinear light in microcavities using nonresonant excitation schemes, offering perspectives on optically reprogramable on-chip polariton circuitry.


In an invited publication in Optical Materials Express, the team of Skoltech, Southamton, MIPT, ITMO, and Universities of Warsaw and Iceland researchers have designed a tight-binding model describing the coupling between localized polariton vortices and identified analogies with conventional spin-orbit-coupled spinor polaritons. Full paper here


In a publication in Science Advances, researchers from Skoltech and Southampton realized the rotating bucket experiment for optically trapped quantum fluid of light based on exciton-polariton Bose-Einstein condensate in semiconductor microcavity. These results enable the study of polariton superfluidity on a par with other superfluids, as well as deterministic, all-optical control over structured nonlinear light. Full article here.


In a publication in Phys. Rev. Research, researchers from Skoltech and Southampton theoretically implement a strategy from quantum computation architectures to simulate Stuart-Landau oscillator dynamics in all-to-all connected networks, also referred to as complete graphs. Full article here.


Our paper on Spontaneous Formation of Time-Periodic Vortex Cluster in Nonlinear Fluids of Light is featured on the cover of Physical Review Letters. The article is a collaboration between Skoltech and Southampton University. This work opens exciting perspectives on designing complex structured light sources with periodically evolving singular phase patterns in the strong light-matter coupling regime. Read more at Phys.org.


In a publication in Physical Review B, researchers from Skoltech and Southampton theoretically demonstrated the possibility to use microcavity gain to shape 2D optics, allowing in-plane control of polariton flow. A nonresonant excitation beam is used to shape a 2D lens, that focuses polariton flow into a high density focus. Full article here.


The Hybrid Photonics Labs at Skoltech report the registration of their first software patent in the Russian Federation. The patent related to control software for spatial light modulators, a key component in generating high complexity laser excitation beams. More details (in Russian) here.


Work from the collaboration (Southampton, Moscow and Warsaw) is picked up as an "editor's suggestion" by Physical Review Letters and is displayed on the front page of the publication's website. A nice achievement showcasing how powerful liquid crystal microcavity material systems can be for creating synthetic Hamiltonians! More details here.


Researchers from Skoltech and Southampton, in collaboration with Sheffield University, demonstrate a simplified approach to fabricate high-reflectivity mirrors suitable for applications in a strongly-coupled organic-semiconductor microcavity, by using a small number of quarter-wave dielectric pairs deposited on top of a thick silver film that combine high reflectivity and broad reflectivity bandwidth. Lowering costs of sample fabrication, this represents a nice step towards commercialization of polaritonics devices. Full article here.


For it's 10 years anniversary, Skoltech worked with Nature to highlight 5 of the institute's research priorities, including the activities of the Hybrid Photonics Labs. Recent research activities of the lab are highlighted, included recent work on single photon transistors. Prof. Lagoudakis and Prof. Berloff comment on the achievements of Skoltech and of the lab. Read more on Nature site


The second Polaritonics Day took place at Skoltech new campus in Moscow on the 8th of November. Gathering about 60 experts from the field, the day was filled with presentations from Russian and international speakers and followed by lab visits and social activities. A very successful day! More info on the event website.


Researchers from Skoltech, led by Dr. Sergey Alyatkin, demonstrate a nonequilibrium phase transition between distinct regimes of polariton condensation by placing polariton condensates in a non-Hermitian Lieb lattice of scatterer potentials. Results are reported in Nature Communications.


In a world first, researchers at Southampton University and Skoltech, in collaboration with main partners at IBM Research Zurich and Wuppertal University, report the demonstration of a room temperature THz speed single photon optical switch. This is believed to be a breakthrough for low-power ultra-fast all-optical computing! Results were published in the prestigious journal Nature. Big congratulations to all involved! Full article here.


Researchers from Skoltech and Southampton demonstrated in Physical Review B the formation of spin-polarized jets in extended systems of ballistic exciton-polariton condensates in semiconductor microcavities. We showed a tunable spin-dependent potential landscape for polaritons, with the appearance of intricate polarization patterns due to coherent matter-wave interference. Full article here.


Current and former researchers at the Hybrid Photonics Labs at Skoltech and Southampton, along with collaborators from Wolverhampton, ITMO and Université Clermont-Auvergne, theoretically proposed a condensed-matter platform for analog simulation of complex two-dimensional molecular bonding configurations based on optically trapped exciton-polariton condensates. Full article here.


Artificial 'molecules' open door to ultrafast polaritonic devices. Natalia Berloff, Professor at CPQM, and her colleagues from the University of Cambridge have shown that polaritons, the quirky particles that may end up running the quantum supercomputers of the future, can form structures behaving like molecules – and these “artificial molecules” can potentially be engineered on demand. Read on TASS, 3D News (RUS), Space Daily, nanowerk.com, Skoltech.ru (ENG)


Another week, another exciting liquid crystals paper! Researchers at Skoltech and Southampton in collaboration with Warsaw University demonstrated in  Optica the experimental observation of a stable individual second-order meron and antimeron appearing in an electromagnetic field in a liquid crystal microcavity. More in EurekaAlerts, SciTechDaily and Skoltech.ru.


Following up our fruitful collaboration with the University of Warsaw, we theoretically investigated in a Letter in Physical Review B coupling two optical cavities possessing Rashba-Dresselhaus spin-orbit coupling, TE-TM splitting, and linear polarization splitting that opens a tunable energy gap at the diabolic points of the photon dispersion; giving rise to an actively addressable local Berry curvature.  Read on in Phys.org, Nanowerk.com, Azooptics (ENG), Naked Science (RUS).


Congratulations to Prof. Natalia Berloff, member of the Quantum Polaritonics Partnership and Professor at Skoltech and Cambridge, for making it to the ‘Ioannidis list’ of top 2% cited scientists in their fields!


The LHO group at Southampton University received support from the new Horizon 2020 "Polariton Logic" (POLLOC). In collaboration with ETH, IBM Zurich, CNRS and AMO GmbH, the project will aim to engineer solutions for all-optical computing using organic polaritonics platform. As a natural continuation of our recent article demonstrating a room-temperature organic polariton transistor (A. Zasedatelev et al., Nature Photonics, 13, 378–383(2019)), we are excited to see how far the partners will be able to push the state of the art.


In collaboration with Lancaster University, we demonstrate a new optical method to synthesize artificial solid-state crystal structures for cavity-polaritons using only laser light, with a publication in Nature Communications. The results could lead to the realization of field-programmable polariton circuitry and to new strategies to create guided light and robust confinement of coherent light sources.  Read more on Skoltech website, Science Codex and Phys.org. 


Prof. Natalia Berloff, Skoltech/University of Cambridge, and collaborators  proposes an alternative theoretical framework for simulating spin Hamiltonians with a network of spatially localised polariton condensates that do not interact with one another geometrically, in a report published in Nanophotonics.


Our paper on Optical Control of Couplings in Polariton Condensate Lattices is featured on the cover of Physical Review Letters. The article is a collaboration between Skoltech and Southampton University. By allowing precise control of the interaction between nodes, this devellopment brings polariton simulators one step closer to reality. Read more at Phys.org.


The work of Prof. Natalia Berloff (Skoltech & University of Cambridge) is featured in the inside back cover of Advanced Quantum Technologies. There is a growing interest in investigating new states of matter using out‐of‐equilibrium lattice spin models in two dimensions. However, a control of pairwise interactions in such systems has been elusive as due to their nonequilibrium nature they maintain nontrivial particle fluxes even at the steady state. In this work, we suggest how to overcome this problem and formulate a method for engineering reconfigurable networks of nonequilibrium condensates with control of individual pairwise interactions.


Prof. Pavlos Lagoudakis (Skoltech & Southampton University) has become the first foreign academic to win a research grant from the Russian Foundation for Basic Research. The grant awarded are to support our research on organic polaritonics, and specifically on “Hybrid polariton condensates and transistors based on organic and inorganic semiconductors” (in collaboration with the German DFG and Wurzburg University) and on “Vibron-polariton collective states and laser generation at room temperature” (a follow up of our liquid crystal research recently highlighted in Science, in collaboration with Polish colleagues). Read more on Skoltech Website.


In collaboration with Polish colleagues, we demonstrated in Science the creation of spin-orbit synthetic Hamiltonians in liquid-crystal optical cavities.  As the properties of the cavity were modified by an external voltage, the photons behaved like massive quasiparticles endowed with a magnetic moment, called “spin”, under the influence of an artificial magnetic field. Read more at SciTechDaily, EurekAlert, EENews


The Hybrid Photonic Labs at Skoltech hosted today Dr. Maria Kandyla (National Hellenic Research Foundation, Athens, Greece), who gave a talk on "Development and applications of laser processed hybrid nanomaterials". She discussed in details how combining silicon micro/nanostructures with thin semiconducting films results in electronic heterojunctions with large active surface area and improved optoelectronic performance. We are thankful to the speaker for making the trip from Greece and look forward to a fruitful collaboration.


The first Polaritonics Day took place today at the new Skoltech campus near Moscow. Lectures by leading academics were attended throughout the day by representatives of the academic community and relevant industrial partners. The topics covered the full scope of modern polaritonics, from the more traditional foundations of the field to new exotic physics. Attendees were afterwards given the opportunity to visit the Skoltech Hybrid Photonics Labs where the lab technologies were demonstrated. An event dinner was organized in the evening, during which attendees could discuss the state of the field and plan future endeavours.

On behalf of the organizing committee, we would like to thank all speakers and attendees for a very successful and productive day!


Our teams at Skoltech and the University of Southampton, along with partners at IBM Zurich and University of Wuppertal, are proud to report on the front cover of Nature Photonics the first ambient-temperature, cascadable, all-optical transistor capable using polaritoncs in an organic microcavity with ladder-type polymer gain medium. We demonstrate a net gain of ~10 dB μm−1, sub-picosecond switching time, cascaded amplification and all-optical logic operation at ambient conditions. Read more on IBM Website, Pro-Physik (DE), Elektronik Praxis (DE), RIA Novosti (RU), 3DNews (RU).


The Hybrid Photonics Labs at Skoltech, along with other partners of the Quantum Polaritonics Partnership, are glad to invite all interested parties to attend the first Skoltech Polaritonics Day on July the 1st. The event will highlight the latest cutting edge research in the field of strong light matter coupling phenomena, and event will bring together a global network of scientists from industry and academia to discuss their latest research in the field. 

Confirmed guest speakers include Prof. Vladimir Agranovich (Troitsk, Russia) Prof. Atac Imamoglu (ETH, Switzerland), Franko Nori (Riken, Japan), Dr. Rainer Mahrt (IBM Zurich, Switzerland), Prof Sven Hoefling (University of Wurzburg, Germany). 

More details on the event website.


Prof. Berloff (Skoltech & University of Cambridge) presented today the results of her research using polariton platforms for solving hard optimization problems "mappable" into the XY model, at an Open Colloquium organized by the Russian Quantum Center at the National University of Science and Technology MISIS. In her talk, she discussed the range of optimization problems that can be efficiently solved by polariton graphs and focused on elucidating the relationship between the energy spectrum of the XY Hamiltonian and the total number of condensed polariton particles. This theory underpinned the recent Nature Materials publication "Realizing the classical XY Hamiltonian in polariton simulators", a fruit of the Quantum Polaritonics Partnership.


Skoltech researchers presented on Russian national news (TV channel Rossiya 1 )their work on the polariton simulator and discussed how Skoltech is providing the right international environment to foster such developments.

See here for the full interview (in Russian).


Skoltech senior researcher Dr. Anton Zasedetalev gave an interview to the online science TV channel  Шаг России, where he disccuses the Hybrid Photonics Labs recent work on polariton simulation and how he believes polariton physics can make an impact in the world of high performance computing.

See here for the full interview (in Russian).


The work of Prof. Lagoudakis (Skoltech & University of Southampton) is highlighted on the cover of Light Science & Application. The result of fruitful collaboration with Polish colleagues at the University of Warsaw and at the Institute of Applied Physics of the Military University of Technology, the article, "Tunable optical spin Hall effect in a liquid crystal microcavity", demonstrates for the first time external control of spin currents by modulating the splitting between transverse electric and magnetic fields in liquid crystals integrated in microcavities. 


We are glad to see our work highlighted on the back cover of Advanced Optical Materials. A collaboration of researchers of the Quantum Polaritonics Partnership with colleagues at the University of Sheffield, the article "A Yellow Polariton Condensate in a Dye Filled Microcavity" demonstrates polariton condensation in the yellow part of the visible spectrum from a planar organic semiconductor microcavity containing the molecular dye bromine‐substituted boron‐dipyrromethene. Such structures maybe be of interest in the development of new devices, including high-efficiency lasers and light-sources.

Read more on Advanced Science News


The researchers of the Partnership are proud to see their work published today in the prestigious journal Nature Materials. The article, Realizing the classical XY Hamiltonian in polariton simulators, is the culmination of several years of intense collaboration between Skoltech, the University of Southampton and the University of Cambridge. By showing how polaritonics platforms can be used to map computationally complex problems into a classical spin system, such as the XY model, this is a very exciting development for the whole field of polaritonics. Big congratulations to all researchers involved!

Read more on Science Alert, New Atlas, Futurism, Nanowerk.