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Performance of InGaAs/GaAs Microdisk Lasers with Improved Thermal Resistance
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Kryzhanovskaya N., Dragunova A., Fominykh N., M.V. Maximov, Moiseev E., F.I. Zubov, Ivanov K., Makhov I., Mozharov A. M., Kaluzhnyy N. N., Mintairov S. A., Guseva Y. A., Gordeev N. Y., Zhukov A.
We discuss the static characteristics and high-frequency performance of microdisk lasers with an active region based on dense array of InGaAs/GaAs quantum well-dots having the improved thermal resistance. The decrease in thermal resistance of the microlasers is achieved by epi-side down bonding on a heat-conducting Si substrate. Compared to the characteristics of initial microlasers, the bonding results in a in thermal resistance decreasing by a factor of 2.3 (1.8) in microdisks with a diameter of 19 (31)µm, Further improvement of heat removal is achieved by a thinner epitaxial structure between the active region and the heatsink, realized by concept of two coupled resonant planar waveguides. Using this method, we managed to place the active region at a distance of only 870 nm from the surface of the heterostructure and achieve the record low thermal resistance of 0.17 K/mW in bonded lasers.
Ivanov K., Fedosov I. S., Войтович В. И. et al., 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 ...
Added: June 4, 2026
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
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
Fominykh N., Fedosov I. S., Kryzhanovskaya N. et al., Письма в Журнал технической физики 2025 Т. 51 № 19 С. 11–14
The directed emission output of microdisk lasers through a coupled optical waveguide fabricated from the same heterostructure has been investigated. Disks with diameters of 30 and 40 µm containing an active region based on InGaAs/GaAs quantum dots were studied. To reduce absorption losses in the waveguide, a forward bias was applied to it. At a ...
Added: August 27, 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
A. A. Karaborchev, I. S. Makhov, Shandyba N. A. et al., Journal of Physics D: Applied Physics 2024 Vol. 57 No. 28 Article 285104
In this papaer, the emission characteristics of InAs/InGaAs quantum dot (QD) microdisk lasers, of different cavity diameters, with a top split electrical contact formed using the focused ion beam technique are investigated. The dependences of the threshold currents of two-state lasing (i.e. currents corresponding to the start of the ground- and excited-state lasing) for microdisks ...
Added: August 26, 2024
Zhukov A., Nadtochiy A., Alexey Karaborchev et al., Optics Letters 2024 Vol. 49 No. 2 P. 330–333
A quantum-dot microdisk was optically pumped by continuous-wave excitation with a level sufficient for the ground-state lasing. The microdisk was additionally illuminated with sub-ps pulses of various powers. It was found that there is a critical level of pulse power that determines the subsequent transient process of the microlaser. Depending on the level of the ...
Added: February 5, 2024
A.S. Dragunova, N.V. Kryzhanovskaya, F. I. Zubov et al., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2023 Vol. 16 No. 1.2 P. 108–113
In this work, we study the characteristics of semiconductor microlasers based on the heterostructure with two coupled waveguides intended to improve heat dissipation in cw regime. We analysed total output optical loss of the microlasers, their spectral characteristics, output power, emission pattern and thermal resistance. We observed that the use of the principle of two ...
Added: July 3, 2023
A. A. Karaborchev, I. S. Makhov, M. V. Maximov et al., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2023 Vol. 16 No. 1.3 P. 157–162
The paper reports on the implementation of two-level lasing in injection microlasers with self-organized InAs/GaAs quantum dots. Emission bands related to the radiative electron-hole recombination involving ground and several excited states of quantum dots are observed in the spontaneous electroluminescence spectra. We investigated two-level lasing via the ground and first excited states of quantum dots ...
Added: July 3, 2023
Makhov I., Ivanov K., Moiseev E. et al., Photonics 2023 Vol. 10 No. 3 Article 235
The two-state lasing phenomenon, which manifests itself in simultaneous laser emission
through several optical transitions of quantum dots, is studied in microdisk diode lasers with
different cavity diameters. The active region represents a multiply stacked array of self-organized
InAs/InGaAs/GaAs quantum dots emitting in the wavelength range of 1.1–1.3 um. Two-state
lasing, which involves the ground-state and the first excited-state ...
Added: April 25, 2023
Ter-Zakaryan K. A., Zhukov A. D., Bobrova E. Yu. et al., Polymers 2021 Vol. 13 No. 21 Article 3698
Abstract: The application of foamed polymers as one of the components of insulating coatings allows to solve the problems of energy saving and creation of optimal operating conditions for constructions. The systems of application of energy-efficient heat-insulating materials must consider both the particularities of the insulating materials and the functional orientation of the constructions. The ...
Added: March 21, 2023
Zhukov A., Moiseev E., Nadtochiy A. et al., IEEE Journal of Quantum Electronics 2023 Vol. 59 No. 1 Article 2000108
We discuss the origin of optical losses in microdisk lasers with a dense array of InGaAs quantum dots in the active
region. In particular, we study the effect of microlaser diameter D variation from 15 to 200 μm on optical losses of different nature. A strong dependence of the lasing wavelength on the diameter is observed: ...
Added: January 26, 2023
Fetisova M., Kryzhanovskaya N., Reduto I. et al., Journal of the Optical Society of America B: Optical Physics 2020 Vol. 37 No. 6 P. 1878–1885
A strip-loaded horizontal slot waveguide is used for routing the emission of a microdisk laser. The active region of the laser contains InAs/InGaAs/GaAs quantum dots operating in CW mode under optical pumping. Although the quantum dots emit in a broad range, the laser emission is single mode with 𝜆=1290nmλ=1290nm. Atomic layer deposition is used for the ...
Added: September 23, 2022
F I Zubov, E I Moiseev, A M Nadtochiy et al., Semiconductor Science and Technology 2022 Vol. 37 No. 7 Article 075010
Epi-side down bonding on a silicon substrate of AlGaAs/GaAs microdisk lasers is presented. A heterostructure with coupled large optical cavities enables location of an InGaAs quantum dot active region at a distance of ∼1 µm from the heterostructure surface. The thermal resistance was reduced to 0.2 and 0.1 K/mW for disks of 30 and 50 µm in diameter, ...
Added: July 12, 2022
Zhukov A., Moiseev E., Nadtochiy A. et al., Laser Physics Letters 2022 Vol. 19 No. 2 Article 025801
The small-signal amplitude modulation, threshold, and spectral characteristics of microdisk lasers with InGaAs/GaAs quantum well-dots active region were studied jointly with the spectral and threshold parameters of edge-emitting lasers made from the same epitaxial heterostructure. Using the obtained material parameters, the relative intensity noise of the microdisk lasers was calculated as a function of the ...
Added: February 28, 2022
Kryzhanovskaya N., Zubov Fedor I., Moiseev E. et al., Laser Physics Letters 2022 Vol. 19 No. 1 Article 016201
Characteristics of a compact III–V optocoupler heterogeneously integrated on a silicon substrate
and formed by a 31 μm in diameter microdisk (MD) laser with a closely-spaced
50 μm × 200 μm waveguide photodetector are presented. Both optoelectronic devices were
fabricated from the epitaxial heterostroctructures with InGaAs/GaAs quantum well-dot layers.
The measured dark current density of the photodetector was as ...
Added: December 2, 2021
Kryzhanovskaya N., Zhukov A., Moiseev E. et al., Journal of Physics D: Applied Physics 2021 Vol. 54 Article 453001
Semiconductor whispering-gallery-mode (WGM) microresonators are promising candidates for
creating compact, energy-efficient light sources (microlasers) for various applications owing to
their small footprints, high Q factors, planar geometry, in-plane light emission, and high
sensitivity to the environment. In this review we present the most recent advances in III–V
microdisk/microring lasers. We briefly describe basic physics behind photonic WGM resonators
and discuss ...
Added: September 3, 2021
Зубов Ф. И., Максимов М. В., Moiseev E. et al., Optics Letters 2021 Vol. 46 No. 16 P. 3853–3856
We study the impact of improved heat removal on the performance
of InGaAs/GaAs microdisk lasers epi-side down
bonded onto a silicon substrate. Unlike the initial characteristics
of microlasers on a GaAs substrate, the former’s
bonding results in a decrease in thermal resistance by a factor
of 2.3 (1.8) in microdisks with a diameter of 19 (31) m,
attributed to a thinner ...
Added: August 30, 2021
Kryzhanovskaya N., Moiseev E., Nadtochiy A. et al., , in: Integrated Optics: Design, Devices, Systems and Applications VIVol. 11775.: Washington: SPIE, 2021. Ch. 117750P P. 75–79.
A method of hybrid integration of quantum dot microdisk lasers with silicon wafer is proposed and realized. In addition
to the possibility of combining microlasers with various silicon-based electronic and photonic devices, this makes it
possible to significantly improve heat removal from the active region of the microlaser. The thermal resistance
normalized to the mesa area reaches the ...
Added: August 30, 2021