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  • Microlasers with Quantum Dots Remain Functional at Elevated Temperatures

Microlasers with Quantum Dots Remain Functional at Elevated Temperatures

Researchers from the HSE International Laboratory of Quantum Optoelectronics in St Petersburg have explored the impact of resonator size on the operating temperature of a microdisk laser with quantum dots in a two-level generation mode. Their findings reveal that microlasers can produce radiation across multiple frequencies, even under elevated temperatures. In the future, this breakthrough will enable the integration of microlasers into photonic circuits, potentially doubling information transmission capabilities. The study findings have been published in Nanomaterials.

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HSE University to Host All-Russian Student's Tournament of Physicists for the First Time

The All-Russian Student's Tournament of Physicists is a competition in which teams of students from different universities offer their solutions to problems and defend them before rival teams. The HSE University Faculty of Physics traditionally participates in the organisation of the competition and task development. This year, on February 13–17, the tournament will be held at HSE University for the first time. It will include two rounds—the qualifiers and the final. In the final round, three teams and their captains will compete with each other.

Lavsan and Kapton Tested Under Space-like Radiation Conditions

In a ground-breaking experiment, HSE MIEM researchers subjected Lavsan (polyethylene terepfthalate, polyester) and Kapton (polypiromellitimide, polyimide) polymers, commonly used in space technology, to ionising radiation for durations ranging from microseconds to several hours at temperatures of -170°C and +20°C, while comparing their electrical conductivity under extreme conditions. The study reveals that at -170°C, Kapton's conductivity is ten times lower than at +20°C. These findings can assist engineers in developing more effective protection for spacecraft against static discharges induced by ionising radiation. The study has been published in Journal of Applied Physics.

Human Bodies Impede 6G Signal Transmission

A team of researchers, including scientists from HSE University, have investigated the influence of human movement on the propagation of 6G signals. Within a range of up to 10 metres, the signal attenuation is comparatively minor, yet brief connection failures may still occur. Based on the study findings, a blockage detection algorithm has been developed to account for both signal attenuation and interruptions. The gaming industry is likely to derive the greatest benefits from this discovery. A paper with the study findings has been published in Computer Communications.

Russian Researchers ‘Peek Inside’ Carbon Nanopores

Researchers from HSE MIEM, in collaboration with colleagues at the RAS Institute of Solution Chemistry, have modelled the behaviour of ionic liquids within charged carbon nanopores ranging in width from 1 to 15 nm and assessed the mobility of both their cations and anions. The scientists observed that an increase in anion size resulted in higher mobility, whereas cations exhibited the opposite trend of reduced mobility with an increase in size. A better understanding of ionic liquids will enhance their use in supercapacitor technology. The study has been published in Journal of Molecular Liquids and supported by a grant from the Russian Science Foundation (RSF).

'We Can Modify Electron Spins as Required by Applying an External Magnetic Field'

Researchers from HSE, MIPT, and the Russian Academy of Sciences Institute of Solid State Physics, jointly with colleagues from the UK, Switzerland, and China, have conducted a study on the characteristics of thin films composed of platinum and niobium. Both the experiments and the theoretical calculations have confirmed that when in contact with a superconductor, platinum exhibits a spin, creating a potential for its effective use for data transmission. Platinum atoms have no magnetic moment, paving the way for the development of even smaller chips utilising this novel structure compared to conventional spintronics. The paper has been published in Nature Communications.

‘Students at HSE University’s Faculty of Physics Receive a World-Class Education’

On October 10, 2016, the Faculty of Physics was created at HSE University. It was the university’s first natural science faculty. Its first master’s students graduated in 2019, its first bachelor’s students completed their studies in 2021, and the first doctoral students will do the same in 2023 after beginning their bachelor’s studies in 2017. In his interview, Mikhail Trunin, Dean of HSE University’s Faculty of Physics, talks about the Kapitsa educational system implemented at the faculty, the results that have been achieved in seven years of work, and what is still missing.

Russian Radio Astronomers Discover a Method for Predicting Solar Flares

Researchers from HSE in Nizhny Novgorod and the Pulkovo Astronomical Observatory (CAO RAS) examined data on microwave emissions from several active solar regions. Astronomers discovered that a few hours prior to a flare, there was an increase in oscillations in the region with the highest observed brightness of the microwave emission during the flare. This method can potentially be used to achieve more accurate predictions of severe solar flares. The study has been published in Geomagnetism and Aeronomy.

Scientists Develop Algorithm for Accurate Calculation of Quantum Systems

Researchers from the MIEM HSE Centre for Quantum Metamaterials, jointly with colleagues from Germany and the UK, have proposed an algorithm for the automated compression of arbitrary environments (ACE). It opens up exciting new possibilities for the precise calculation of the dynamics of quantum systems. According to the scientists, the new method can assist in the design of quantum computers and novel communication systems. The study findings are published in Nature Physics.

The Light of Knowledge

On May 20, the ‘Day of Light’ was held for the first time at the HSE University building on Basmannaya Ulitsa. The event was organised and conducted by students of the Faculty of Physics, who told junior students and schoolchildren about the latest scientific achievements.

Russian Physicists Developed the Fastest Algorithm for the Simulation Motion of Microparticles in a Plasma Flow

Physicists from the Joint Institute for High Temperatures of RAS, HSE University, and Moscow Institute of Physics and Technologies have developed the first open-source GPU-based code for the simulation of microparticles motion in a plasma flow.  OpenDust is optimised for graphics accelerators, that allows it to calculate the forces acting on microparticles significantly faster than existing alternatives. A paper with the findings has been published in Computer Physics Communications.