Study of Properties of Laser-Induced Plasma Channels Fodmed by Femtosecond Laser Radiation

Кочуев, Д. А.; Galkin, A. F.; Voznesenskaya, A. A.; Khorkov, K. S.; Chkalov, R. V.

doi:10.3103/s1068335620020062

Cited by 9 publications

(3 citation statements)

References 7 publications

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“…These conditions can be formed by increasing the energy of the laser erosion torch and the laser-induced plasma channel, which was proposed in Refs. [39,40]. These methods can effectively control the processes of heating, expansion of nanoparticles, and the time of their stay in the high temperature region.…”

Section: Resultsmentioning

confidence: 99%

Processes of ablation and structures growth under the action of femtosecond laser pulses on the gallium surface in an ammonia medium

et al. 2023

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In this paper, we present the results of processing metallic gallium in an ammonia vapor medium at 2 bar pressure by femtosecond laser pulses. The influence of the ammonia concentration and the mode of laser beam scanning on the result of laser action is considered. It has been established that an increase in the concentration of ammonia vapor and a change in the scanning regime lead to a radical change in the laser ablation process. A decrease in the scanning speed leads to the cessation of the ablation process and the development of the nitridation process of the gallium surface, accompanied by the formation of columnar structures up to 12 mm long and about 100 μm in diameter. The synthesized nanoparticles and structures were studied using scanning electron microscopy, Raman spectroscopy, and X-ray analysis. Keywords: laser ablation, gallium nitride, gallium nitride nanoparticles manufacturing, ablative synthesis of gallium nitride nanoparticles.

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Section: Resultsmentioning

confidence: 99%

Processes of ablation and structures growth under the action of femtosecond laser pulses on the gallium surface in an ammonia medium

et al. 2023

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“…The calculation of emission spectra in this tool is carried out using the Saha equation, which is valid for the state of thermodynamic equilibrium of the studied plasma (Saha-LTE). Evaluation of the plasma temperature and the concentration of electrons obtained as a result of laser action on the treated surface was carried out by analyzing the relative intensity of spectral lines similar to the method presented in [17][18][19]. The recorded spectral signals correspond to the excited state of the substance (ion I), according to the data [20].…”

Section: Resultsmentioning

confidence: 99%

Laser-induced breakdown spectroscopy monitoring of aluminum alloys laser cleaning process

Voznesenskaya

Гусев

Кочуев

et al. 2022

J. Phys.: Conf. Ser.

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The paper considers an approach to monitoring the condition of the treated surface in real time based on the laser-induced breakdown spectroscopy technique. As a result of the study, the aluminum alloy was cleaned from the plimer coating, spectral analysis was carried out, the relationship between the processing modes and the thickness of the coating being removed was experimentally established, which allows removing the paint coating in one pass without damaging the underlying layers. The optimal spectral range for the control operation, the contrasting spectral lines of the elements that make up the coating, the optimal parameters of laser exposure are determined based on the monitoring data of the spectral signal recorded during laser processing

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“…Для аблированных частиц не создаются условия сорбции азота и формирования GaN, что, вероятно, связано с недостаточным временем пребывания в состоянии необходимой температуры для формирования GaN. Данные условия можно сформировать путем повышения энергии лазерного эрозионного факела и лазерноиндуцированного плазменного канала, что предложено в работах [39,40]. Данные методы могут эффективно осуществлять управление процессами нагрева, разлета наночастиц и временем их пребывания в области высокой температуры.…”

Section: обсуждение результатовunclassified

Процессы Абляции И Роста Структур При Воздействии Фемтосекундных Лазерных Импульсов На Поверхность Галлия В Среде Аммиака

Кочуев¹,

Черников²,

Абрамов³

et al. 2023

Журнал Технической Физики

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Study of Properties of Laser-Induced Plasma Channels Fodmed by Femtosecond Laser Radiation

Cited by 9 publications

References 7 publications

Processes of ablation and structures growth under the action of femtosecond laser pulses on the gallium surface in an ammonia medium

Processes of ablation and structures growth under the action of femtosecond laser pulses on the gallium surface in an ammonia medium

Laser-induced breakdown spectroscopy monitoring of aluminum alloys laser cleaning process

Процессы Абляции И Роста Структур При Воздействии Фемтосекундных Лазерных Импульсов На Поверхность Галлия В Среде Аммиака

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