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September 7, 2026
Biologists Discover 'Molecular Fingerprint' of Preeclampsia
Researchers at HSE University employed a new method to model hypoxia in placental cells during pregnancies complicated by preeclampsia and identified molecular markers of tissue hypoxia. Since hypoxia is one of the key mechanisms underlying preeclampsia, these findings are important for a more accurate and timely diagnosis of the disease and for the development of effective treatment methods. The paper has been published in Placenta.
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Output Power of III-V Injection Microdisk and Microring Lasers

IEEE Journal on Selected Topics in Quantum Electronics. 2025. Vol. 31. No. 2. Article 1501312.
Natalia V. Kryzhanovskaya, Eduard I. Moiseev, Alexey M. Nadtochiy, Ivan A. Melnichenko, Nikita A. Fominykh, Konstantin A. Ivanov, Sergey D. Komarov, Ivan S. Makhov, Evgenii V. L., Aliaksei G. V., Aliaksei V. N., Alexey E. Zhukov

Technological progress makes it possible to significantly reduce the size of semiconductor laser emitters to microscales and sizes commensurate with the emission wavelength. Extreme laser miniaturization can be achieved using disk or ring resonators supporting high-Q whispering gallery modes (WGM). WGMlasers are interesting not only due to small sizes (small mode volume) but also for their long times of light-matter interaction, unique capabilities of sensing and studying of quantum chaos and so on. On the other hand, small losses for the output of emission in high-Q resonators can negate the practical benefits of the laser or even completely hide the peculiarities of the light physics inside the cavity. In this review, we attempted to summarize the published data on the achieved optical output power in different III-V injection microlasers and analyzed the key characteristics that limit the maximum output power, especially influence of the active region self-heating at cw operation and impeded light extraction out of WGM cavities. We compared various III-V materials and fabrication methods developed for improving emission output.We also observe very low relative intensity noise in microdisk lasers and harmonics of the resonance frequency in the relative intensity noise spectrum.

Research target: Physics Nanotechnologies
Language: English
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Keywords: потериmicrodisksrelative intensity noisediode laserslossmicroringsoutput powerдиодные лазерымикродискимикрокольцавыходная мощностьшум относительной интенсивности
Publication based on the results of:
Проектирование, синтез и исследование гетероструктур на основе широкозонных III-N материалов и микролазеров на основе высокодобротных резонаторов (2026)
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