Amorphization and Ablation of Crystalline Silicon Using Ultrafast Lasers: Dependencies on the Pulse Duration and Irradiation Wavelength

Laser & Photonics Review, Год журнала: 2024, Номер 18(11)

Опубликована: Июль 2, 2024

Abstract Using lasers to achieve controlled crystallographic phase changes in silicon with high spatial precision promises new manufacturing solutions semiconductor technologies, including photonics. Recent demonstrations of improved amorphization thicknesses position ultrafast as an optimum tool meet current challenges. Here, the literature on transformations is reviewed and complemented experimental data. This includes ablation response a function pulse duration ( τ = 13.9 134 fs at λ 800 nm) laser wavelength 258 4000 nm 200 pulses). For duration‐dependent studies Si(111), fluence threshold decreases shorter durations, emphasizing significance non‐linear absorption range considered conditions. wavelength‐dependent studies, increases sharply from 1030 nm, followed by near‐constant behavior up 3000 nm. Conversely, these specified ranges. Differences obtained Si(111) Si(100) are also discussed, identifying anomalously large for Finally, question lateral resolution, shown independent interaction nonlinearity addressed.

Язык: Английский

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Ionization dynamics and damage conditions in fused silica irradiated with mid-infrared femtosecond pulses

Applied Physics Letters, Год журнала: 2023, Номер 122(4)

Опубликована: Янв. 23, 2023

The employment of ultrashort laser sources at the mid-infrared (mid-IR) spectral region for dielectrics is expected to open innovative routes patterning and a wealth exciting applications in optics photonics. To elucidate material response irradiation with mid-IR sources, consistent analysis interaction long wavelength femtosecond pulses dielectric materials presented. influence pulse duration particularly emphasized specifying parameters which photoionization impact ionization are important. Simulation results using 2.2, 3.2, 5 μm conducted illustrate optimum conditions onset damage on solid that related occurrence optical breakdown. predict threshold scales as ∼τpa (0.31≤a≤0.37) all wavelengths. Given significant effect induced excitation level surface plasmons (SPs), account formation laser-induced periodic structures oriented perpendicular polarization, correlation produced electron densities SPs SP (∼τpβ, 0.33≤β≤0.39) also discussed this yet unexplored region. guide development an approach strong advanced applications.

Язык: Английский

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2D Materials‐Based Pulsed Solid‐State Laser: Status and Prospect

Laser & Photonics Review, Год журнала: 2024, Номер 18(10)

Опубликована: Май 16, 2024

Abstract Pulsed solid‐state lasers comprise 2D materials as saturable absorbers that contain transparent windows of the atmosphere and characteristic fingerprint spectra several vital molecules are significant in various applications research. Over past few decades, progress has been made development narrow pulse width, high energy, average output power, efficiency, simple construction passively Q‐switched mode‐locked with absorbers. This review summarizes materials, including graphene, transition metal dichalcogenides, black phosphorus, topological insulators, MXenes, modulator devices for owing to their broadband operation, excellent nonlinear optical response, low recovery time, ultrafast dynamic processing, easy fabrication. Then, some new emerging representative pulsed introduced illustrated such laser surgery, material lidar. Finally, future challenges perspectives materials‐based analyzed addressed. The rapid continuous improvement modulation technology is expected expand opportunities application industry, scientific, medical, other areas.

Язык: Английский

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Structural modification in bulk synthetic diamond by ultrashort mid-IR laser pulses

Diamond and Related Materials, Год журнала: 2025, Номер 153, С. 112114 - 112114

Опубликована: Фев. 14, 2025

Язык: Английский

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Fabrication of highly uniform laser-induced periodic structures on polycarbonate via UV femtosecond pulses

Optics & Laser Technology, Год журнала: 2025, Номер 189, С. 113121 - 113121

Опубликована: Май 6, 2025

Язык: Английский

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Tailoring the ultrafast dynamics and electromagnetic surface modes on silicon upon irradiation with mid-infrared femtosecond laser pulses using SiO2 coatings

Physical review. B./Physical review. B, Год журнала: 2024, Номер 109(18)

Опубликована: Май 30, 2024

A key issue in the use of high-power mid-infrared (mid-IR) laser sources for a plethora applications is investigation exciting laser-driven physical phenomena taking place materials coated with dielectric films. Here, we present theoretical ultrafast processes and thermal response upon excitation two-layered complexes consisting fused silica thin films placed on silicon substrates ultrashort pulsed lasers mid-IR spectral regime. Through development model, demonstrate that control underlying damage threshold (DT) substrate are achieved via an appropriate modulation thickness ${\mathrm{SiO}}_{2}$ film. It shown decrease DT by up to \ensuremath{\sim}30% compared absence coating feasible, emphasizing impact coatings lower refractive index than substrate. The conditions surface plasmon (SP) interface between Si influence film SP features also discussed as such electromagnetic modes can initiate structuring interface. Our results manifested striking presence characteristics. be tailored changing superstrate which determines competition air These remarkable predictions employed optical components nonlinear optics photonics large range laser-based applications.

Язык: Английский

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Hybrid Photoexcitation in Undoped Diamond by Mid-Infrared Femtosecond Laser Pulses

JETP Letters, Год журнала: 2024, Номер 120(5), С. 328 - 333

Опубликована: Сен. 1, 2024

Язык: Английский

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Tailoring Surface Topographies on Solids with Mid-IR Femtosecond Laser Pulses

Опубликована: Июнь 26, 2023

Irradiation of solids with ultrashort pulses using laser sources in the mid-infrared (mid-IR) spectral region is a yet predominantly unexplored field that opens broad possibilities for efficient and precise surface texturing wide range applications. In present work, we investigate both experimentally theoretically impact on generation modification related effects subsequent patterning metallic semiconducting materials. Through parametric study correlate mid-IR pulsed parameters onset material damage formation variety periodic structures at wavelength $\lambda_{L}=3200$ nm pulse duration xmlns:xlink="http://www.w3.org/1999/xlink">$\tau_{p}=45$ fs. Results nickel silicon indicate produced topographies comprise high low spatial frequency induced structures, similar to those observed lower wavelengths, while groove absent (Fig. 1a,b). The investigation thresholds suggests incorporation nonlinear generated from three-photon-assisted excitation (for silicon) 1c) consideration role non-thermal excited electron population nickel) very short durations 1d). results demonstrate potential structuring pulses, which can constitute systematic novel engineering approach strong fields long-wavelength regions be used advanced industrial applications [1].

Язык: Английский

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Laser fabrication of 1D and 2D periodic subwavelength gratings on titanium films

Optics & Laser Technology, Год журнала: 2024, Номер 174, С. 110642 - 110642

Опубликована: Янв. 31, 2024

Язык: Английский

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Gibridnoe fotovozbuzhdenie sverkhchistogo almaza femtosekundnymi lazernymi impul'sami srednego IK-diapazona

Письма в Журнал экспериментальной и теоретической физики, Год журнала: 2024, Номер 120(5-6), С. 340 - 345

Опубликована: Окт. 3, 2024

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