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Сопряжение микродискового лазера с волноводом на основе фотонного кристалла
Письма в Журнал технической физики. 2026. Т. 52. № 12. С. 53–58.
The paper presents the model of a microdisk laser – photonic crystal defect waveguide coupling system. Different finite dimensions of photonic crystals are taken into account. It is shown that coupling to a photonic crystal waveguide allows to increase the output power while maintain quality factor, which is not what a traditional coupling to a planar waveguide allows. The influence of the photonic crystal cavity modes coupling to the resonator mode on the efficiency of the power output is also pointed out.
Fedosov I. S., Fominykh N., Kryzhanovskaya N. et al., Физика и техника полупроводников 2025 Т. 59 № 7 С. 388–391
The power and spectral characteristics of the radiation of a semiconductor microdisk laser with a diameter of 40 µm, monolithically integrated with an optical waveguide, have been studied. To reduce absorption in the waveguide, current pumping was used. In the light–current dependence, features associated with the onset of generation at a longer-wavelength resonance are observed. ...
Added: February 27, 2026
Fedosov I. S., Fominykh N., Kryzhanovskaya N. et al., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2025 Vol. 18 No. 3.2 P. 200–204
We investigate the mode composition of a microdisk laser coupled with an optical waveguide. The output spectra of emission and light-current characteristic of the microlaser obtained from the output edge of the waveguide are studied. The microlaser demonstrates single-mode emission in consecutive ranges of injection currents, that are alternated with pronounced mode hoping. The intensity ...
Added: January 12, 2026
Ивашенцева И. В., Третьяков И. В., Уэрдан Г. Д. et al., Н. Новгород: ИПФ РАН, 2024.
Just as optical fiber has replaced electrical cables thanks to its much higher data transfer rates, photonic integrated circuits (PICs) will replace electronic integrated circuits in the foreseeable future.
Single-mode optical fibers are used to connect PICs to external devices, including other PICs.
In our work, we study how radiation from a single-mode optical fiber is coupled ...
Added: December 24, 2025
Ивашенцева И. В., Третьяков И. В., Каурова Н. С. et al., Оптика и спектроскопия 2024 Т. 132 № 10 С. 1076–1086
End-face splicing of optical fibers with waveguides in Si3N4-based photonic integrated circuits (PICs) has been optimized. The mode sizes of the optical fiber and waveguide have been matched for end-face splicing. This was achieved by splicing a single-mode optical fiber with a high-numerical aperture fiber, which reduces the mode size of the optical fiber. A ...
Added: December 24, 2025
Natalia V. Kryzhanovskaya, Sergey D. Komarov, Eduard I. Moiseev et al., IEEE Photonics Technology Letters 2026 Vol. 38 No. 4 P. 243–246
III-N ring microlasers on a silicon substrate with InGaN/GaN active layers emitting near 420 nm were investigated. The growth conditions and fabrication steps were optimized to realize stable lasing under optical pumping in cavities with a diameter of 6-10 um. Chemically sensitive transmission electron microscopy images indicate that InGaN layers present in form of isolated ...
Added: November 18, 2025
Fedosov I. S., Fominykh N., Kryzhanovskaya N. et al., , in: BOOK of ABSTRACTS 12-th International School and Conference on Optoelectronics, Photonics, Engineering and Nanostructures.: -, 2025. Ch. 45 P. 112–113.
We investigate the spectral composition of radiation of microdisk lasers coupled with optical waveguides. We study output spectrum and light-current characteristic of the microlaser obtained from the output edge of the optical waveguide. The microlaser demonstrated single-mode emission in extended ranges of the injection current, up to 75 mA, that are alternated with pronounced mode ...
Added: October 29, 2025
Konstantin A. Ivanov, Alexey E. Zhukov, Eduard I. Moiseev et al., Journal of Applied Physics 2025 Vol. 138 No. 10 Article 103104
Microlasers supporting whispering gallery modes attract great interest because of their potential use in photonic integrated circuits: they have size just an order of magnitude larger than their emission wavelength and exhibit good thermal and dynamic properties. It is usually assumed that in disk microlasers a whispering gallery mode of the highest azimuthal order and ...
Added: September 11, 2025
Anna Obraztsova, Ivan Makhov, Ivan Melnichenko et al., Journal of Lightwave Technology 2025 Vol. 43 No. 15 P. 7278–7284
Spectral characteristics of quantum dot (QD) microdisk lasers under spatially inhomogeneous optical excitation are
investigated. By varying the position and size of the continuous wave excitation spot over the laser cavity, we demonstrate controllable selection and switching of lasing whispering gallery modes (WGMs) at room temperature. Experimental results show that shifting the excitation spot across the ...
Added: September 5, 2025
Образцова А. А., Пивоварова А. А., Komarov S. et al., Физика и техника полупроводников 2025 Т. 59 № 1 С. 37–42
Представлен подход к созданию микролазеров с квантовыми точками на подложках GaAs с дисковым резонатором, электрическим контактом мостикового типа и опорной мезой, сформированными методом жидкостного химического травления. Мостиковая конструкция представляет собой две соединенные подвешенной золотой балкой мезаструктуры, одна из которых является, собственно, микродисковым резонатором, а вторая служит для создания вынесенного электрического контакта. Предложенный метод открывает пути ...
Added: May 26, 2025
Moiseev E., Komarov S., Ivanov K. et al., Письма в Журнал технической физики 2025 Т. 51 № 11 С. 41–45
Созданы микродисковые лазеры с использованием полупроводниковой структуры InGaN/GaN на подложке Si. Продемонстрирована лазерная генерация при комнатной температуре в микролазерах диаметром 5−8 μm, работающих при оптической накачке в импульсном режиме на модах шепчущей галереи. Продемонстрирован сдвиг длины волны генерации от 406 до 425 nm за счет уменьшения оптических потерь лазера при увеличении его диаметра в пределах ...
Added: May 19, 2025
Бабичев А. В., Makhov I., Kryzhanovskaya N. et al., Письма в Журнал технической физики 2025 Т. 51 № 5 С. 41–44
Представлены результаты исследования расщепления мод шепчущей галереи в лазерах спектрального диапазона 930-950 nm на основе вертикального микрорезонатора. Использование распределенных брэгговских отражателей на основе чередующихся слоев Al0.2Ga0.8As/Al0.9Ga0.1As, не поглощающих на длине волны накачного лазера, позволило снизить величину пороговой мощности оптической накачки до 180 μW (для 3 μm-микролазера). Добротность микрорезонатора на пороге генерации для мод шепчущей галереи ...
Added: April 30, 2025
Vlasov V., Aleksei Y. Kuzin, Florya I. et al., Journal of Energy Storage 2025 Vol. 111 Article 115349
This research presents an advanced method for measuring State of Charge (SoC) in Vanadium Redox Flow
Batteries (VRFB) using Refractive Index (RI) combined with Machine Learning (ML). The study comprised of
three primary phases: ex-situ measurements, in-operando measurements, and ML model training. Initially, tests
were conducted using a hybrid photonic-microfluidic sensor on simulated solutions mimicking specific VRFB
SoCs. Subsequently, ...
Added: February 26, 2025
Kryzhanovskaya N., Moiseev E., Nadtochiy A. et al., , in: 2024 Asia Communications and Photonics Conference (ACP) and International Conference on Information Photonics and Optical Communications (IPOC).: IEEE, 2024. P. 1–4.
Semiconductor microdisk lasers developed using III-V epitaxial materials are widely studied during the last decade due to the bright prospectives coming from high quality circular cavity. The threshold and spectral characteristics of microlasers have been studied in sufficient detail, but the issue of the output power of such lasers has not been addressed, just as ...
Added: January 13, 2025