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October 12, 2026
Road Injuries Leading Cause of Death Among Men Aged 10 to 39
Worldwide, road injuries are the leading cause of death among males aged 10–39. An international team of researchers reached this conclusion as part of the Global Burden of Disease Study 2023, analysing data from 204 countries between 1990 and 2023. Their findings have been published in The Lancet Public Health, with HSE University Professor Vasily Vlassov listed among the collaborators.
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The 23rd Annual Meeting of the Valdai Discussion Club was held from September 28 to October 1, 2026 under the theme ‘Responsibility for the Future: Limits of the Possible, or Limitless Possibilities?’ The forum brought together 120 experts from 40 countries, including representatives of China, the United States, India, Brazil, the United Kingdom, Germany, Egypt, Iran, and Japan.
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7th International School and Conference "Saint-Petersburg OPEN 2020" on Optoelectronics, Photonics, Engineering and Nanostructures

Vol. 1695: 7th International School and Conference "Saint Petersburg OPEN 2020": Optoelectronics, Photonics, Engineering and Nanostructures April 27-30, 2020, Saint Petersburg, Russian Federation. Bristol : Institute of Physics Publishing (IOP), 2020.
Under the general editorship: Zhukov A.

7th International School and Conference "Saint-Petersburg OPEN 2020" on Optoelectronics, Photonics, Engineering and Nanostructures was held on April 27 - 30, 2020. The Organizer of the conference is the Alferov Federal State Budgetary Institution of Higher Education and Science Saint Petersburg National Research Academic University of the Russian Academy of Sciences. Initially, the School and Conference was supposed to be held in full-time format at the Alferov Academic University (Saint-Petersburg, Russia), as it happened in the past. However, due to the restrictions imposed by the city authorities on holding mass events due to the threat of the spread of the COVID-19 infection, the conference committees decided to move the conference to the online format. The conference consisted of poster reports presented by the participants and online oral presentations by invited speakers. Posters and video reports of the participants were posted on the conference website. Invited speakers made their presentations online. During their speeches, participants could discuss and ask questions in the chat. The School and Conference included a series of invited talks given by leading professors with the aim to introduce young scientists with actual problems and major advances in physics and technology.

Chapters
Passive mode-locking of p-doped quantum dot semiconductor lasers
Maximov M., Zhukov A., , in: 7th International School and Conference "Saint-Petersburg OPEN 2020" on Optoelectronics, Photonics, Engineering and NanostructuresVol. 1695: 7th International School and Conference "Saint Petersburg OPEN 2020": Optoelectronics, Photonics, Engineering and Nanostructures April 27-30, 2020, Saint Petersburg, Russian Federation.: Bristol: Institute of Physics Publishing (IOP), 2020. P. 012068-1–012068-6.
Quantum dot based monolithic edge-emitting semiconductor lasers at 1.25 m are ideal sources for the generation of broad optical frequency combs for optical communication applications. In this work, InAs/InGaAs quantum dot lasers with di erent total laser length to absorber length ratio and with di erent p-doping concentrations in the GaAs barrier sections are investigated experimentally in dependence on the gain ...
Added: December 29, 2020
Experimental investigation of the far-field emission pattern of microdisk laser modes
Moiseev E., Kryzhanovskaya N., Maximov M. et al., , in: 7th International School and Conference "Saint-Petersburg OPEN 2020" on Optoelectronics, Photonics, Engineering and NanostructuresVol. 1695: 7th International School and Conference "Saint Petersburg OPEN 2020": Optoelectronics, Photonics, Engineering and Nanostructures April 27-30, 2020, Saint Petersburg, Russian Federation.: Bristol: Institute of Physics Publishing (IOP), 2020. P. 012094-1–012094-5.
We studied a far-field emission pattern for microlasers with InGaAs/GaAs quantum well-dots in the active region. Angular-resolved electroluminescence spectra measurement revealed various far-field patterns depending on current and resonance mode. ...
Added: January 18, 2021
1.55 μm range edge-emitting laser diodes based on InGaAs/InGaAlAs superlattice and InGaAs quantum wells
Zhukov A., , in: 7th International School and Conference "Saint-Petersburg OPEN 2020" on Optoelectronics, Photonics, Engineering and NanostructuresVol. 1695: 7th International School and Conference "Saint Petersburg OPEN 2020": Optoelectronics, Photonics, Engineering and Nanostructures April 27-30, 2020, Saint Petersburg, Russian Federation.: Bristol: Institute of Physics Publishing (IOP), 2020. P. 012072-1–012072-5.
Two laser heterostructures with active region based on seven InGaAs quantum wells and on InGaAs/InGaAlAs superlattice were grown on InP substrates by molecular beam epitaxy. Both active regions were designed for vertical-cavity surface-emitting lasers of 15351565 nm spectral range and had total thickness about 80-90 nm. Characteristics of edgeemitting laser diodes fabricated from grown laser heterostructures were studied ...
Added: January 26, 2021
Analysis of the lasing characteristics of InGaAs/GaAs WGM microlasers
Kryzhanovskaya N., Moiseev E., Zhukov A. et al., , in: 7th International School and Conference "Saint-Petersburg OPEN 2020" on Optoelectronics, Photonics, Engineering and NanostructuresVol. 1695: 7th International School and Conference "Saint Petersburg OPEN 2020": Optoelectronics, Photonics, Engineering and Nanostructures April 27-30, 2020, Saint Petersburg, Russian Federation.: Bristol: Institute of Physics Publishing (IOP), 2020. P. 012096.
We present an analysis of spectral and threshold characteristics of InGaAs/GaAs quantum well-dot microdisk laser operated under cw current injection at room temperature without external cooling. The experimental values of the threshold current for the disk and ring microlasers are compared. We observe that the threshold current can be significantly decreased in devices with large diameters (more than 30 ...
Added: January 26, 2021
Investigation of microdisk and microring lasers based on InGaAs/GaAs QWDs by the interferometry method
Moiseev E., Kryzhanovskaya N., Maximov M. et al., , in: 7th International School and Conference "Saint-Petersburg OPEN 2020" on Optoelectronics, Photonics, Engineering and NanostructuresVol. 1695: 7th International School and Conference "Saint Petersburg OPEN 2020": Optoelectronics, Photonics, Engineering and Nanostructures April 27-30, 2020, Saint Petersburg, Russian Federation.: Bristol: Institute of Physics Publishing (IOP), 2020. P. 012093-1–012093-4.
The scanning interferometer method is used to measure the line width of microdisk and microring lasers with a diameter of the resonator ranging from 15 to 50 μm and active area based on InGaAs/GaAs quantum well-dots. Above the threshold, the spectral width of the line did not exceed 3 pm for all samples under study. ...
Added: January 26, 2021
Lateral mode behaviour in diode lasers based on coupled ridges
Zhukov A., Максимов М. В., , in: 7th International School and Conference "Saint-Petersburg OPEN 2020" on Optoelectronics, Photonics, Engineering and NanostructuresVol. 1695: 7th International School and Conference "Saint Petersburg OPEN 2020": Optoelectronics, Photonics, Engineering and Nanostructures April 27-30, 2020, Saint Petersburg, Russian Federation.: Bristol: Institute of Physics Publishing (IOP), 2020. P. 012095.
We present a study of diode lasers with two identical optically coupled ridges. Two coupled ridges were made gradually divergent to a distance of 50 μm which allowed creating three electrically isolated sections within a single laser. We carried out numerical simulations of the electromagnetic modes in the coupled ridge waveguide and calculated far-field patterns for each mode. The ...
Added: January 27, 2021
Dielectric surrounding bleaches the optical bond between a microdisk resonator and a straight optical waveguide
Scherbak S., Kryzhanovskaya N., Zhukov A., , in: 7th International School and Conference "Saint-Petersburg OPEN 2020" on Optoelectronics, Photonics, Engineering and NanostructuresVol. 1695: 7th International School and Conference "Saint Petersburg OPEN 2020": Optoelectronics, Photonics, Engineering and Nanostructures April 27-30, 2020, Saint Petersburg, Russian Federation.: Bristol: Institute of Physics Publishing (IOP), 2020. P. 012128-1–012128-6.
We performed a numerical study of a surrounding medium influence on coupling efficiency between a microdisk resonator supporting optical whispering gallery modes and a straight optical waveguide. Quality factors of the modes and relative optical power coupled to the waveguide were calculated using COMSOL Multiphysics environment. It was shown that the most efficient coupling takes place when propagation constants ...
Added: January 27, 2021
Research target: Nanotechnologies Physics
Priority areas: engineering science
Language: English
Sample Chapter
DOI
Text on another site
Keywords: nanostructuresoptoelectronicsphotonicsapplied physics
Publication based on the results of:
Optoelectronic devices for optical interconnects and optical on-chip systems based on semiconductor nanomaterials (2020)
7th International School and Conference "Saint-Petersburg OPEN 2020" on Optoelectronics, Photonics, Engineering and Nanostructures
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