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DOI: 10.17586/1023-5086-2024-91-02-112-121
УДК: 544.537
Second harmonic generation with activation effect in a flexible membrane with silicon nanowires
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Publication in Journal of Optical Technology
Масталиева В.А, Неплох В.В., Айбуш А.В., Фёдоров В.В., Якубова А.А., Коваль О.Ю., Гудовских А.С., Макаров С.В., Мухин И.С. Генерация второй гармоники c эффектом активации в гибкой мембране с кремниевыми нитевидными нанокристаллами // Оптический журнал. 2024. Т. 91. № 2. С. 112–121.
http://doi.org/10.17586/1023-5086-2024-91-02-112-121
Mastalieva V.A., Neplokh V.V., Aybush V.A., Fedorov V.V., Yakubova A.A., Koval O.Y., Gudovskikh A.S., Makarov S.V., Mukhin I.S. Second harmonic generation with activation effect in a flexible membrane with silicon nanowires [In Russian] // Opticheskii Zhurnal. 2024. V. 91. № 2. P. 112–121. http://doi.org/10.17586/1023-5086-2024-91-02-112-121
Viktoriia A. Mastalieva, Vladimir V. Neplokh, V. Arseniy Aybush, Vladimir V. Fedorov, Anastasiya A. Yakubova, Olga Y. Koval, Alexander S. Gudovskikh, Sergey V. Makarov, and Ivan S. Mukhin, "Second harmonic generation with the activation effect in a flexible membrane with silicon nanowires," Journal of Optical Technology. 91(2), 125-130 (2024). https://doi.org/10.1364/JOT.91.000125
The subject of study is nonlinear optical properties of arrays of silicon nanowires formed by etching in inductively coupled plasma using a microsphere mask with a diameter of 80 nanometers and height of 1.3 micrometers, encapsulated in polydimethylsiloxane. The aims of study are: the development of a converter of IR radiation into the visible range based on flexible polymer membranes of large area encapsulating arrays of silicon nanowires; the diagnostics of nonlinear optical properties of arrays of silicon nanowires, the determination of the conversion mechanism of incident IR radiation into the optical harmonics of higher orders of the visible spectral range, the estimation of the second harmonic generation efficiency. Method. Excitation of the second harmonic generation in the extended visible spectral range using a parametric amplifier for precise selection of excitation wavelength in a wide spectral range allows us to study nonlinear effects of different orders and to work near the electric and magnetic resonances of nanocrystals. Nonlinear optical studies of membranes of silicon nanowires in polymer were carried out using a laser scanning microscope. Femtosecond laser pulses were applied through the external port of the microscope acousto-optic modulator. Main results. The study of the infrared-to-visible range converters based on silicon nanowires is motivated by the works on second harmonic generation on the silicon surface and in bulk silicon under the external displacement. The proposed methods differ from those considered in this paper in both materials and diagnostic methods: the properties of planar resonators fabricated by standard methods of the thin film processing and patterning were studied earlier, while the second harmonic generation occurs mainly in bulk silicon, in which the necessary parameter c(2) arises when the external electric field or mechanical voltage is applied. It is worth noting that the spectral region of the second harmonic signal lies within the range of the optical fiber transparency window, and the characterization is performed in a unique experimental setup with tunable wavelength. Thus, this work demonstrates the enhanced second harmonic generation in structures fundamentally new in the method of obtaining and analyzing nonlinear effects of silicon nanowires membranes in polymer. In the experiment the effect of irradiation with femtosecond laser pulses leading to a significant and irreversible increase of the second harmonic generation signal was found, which is related to the restructuring of the surface material and electro-induced second harmonic due to charging of electron traps in the near-surface layer of the crystal. Practical significance. The obtained results represent new approaches to the design and manufacture of converters of infrared range into visible light. The developed membranes of silicon nanowires in polymer are necessary for creation of silicon-integrated light converters, including visualizers of the infrared radiation.
silicon nanowires, nonlinear optics, nanophotonics, infrared radiation, second harmonic, silicon, flexible devices
Acknowledgements:this work was supported by the Russian Science Foundation, Project № 23-79-00018
OCIS codes: 190.0190, 300.0300
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