Femtosecond laser fabrication of linear graphitized microstructures in a bulk of polycarbonate samples

5th International Conference of Photonics and Information Optics

Ganin, D.V.^1,2 ; Lapshin, K.E.^1 ; Obidin, A.Z.^1 ; Vartapetov, S.K.^1

Physics Instrumentation Centre of Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow

142190, Russia^1

National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, 31 Kashirskoe shosse, Moscow

115409, Russia^2

关键词: Curved lines;    Filamentary structures;    Focal spot;    High aspect ratio;    Mechanism of formation;    Pulse overlapping;    Self diffraction;    Spherical lens;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/737/1/012023/pdf
DOI  :  10.1088/1742-6596/737/1/012023

来源: IOP

【 摘 要 】

We have fabricated high aspect ratio straight and curved graphitized lines inside of polycarbonate samples by using a femtosecond laser. Use of a spherical lens with high NA to focusing femtosecond pulse in the bulk of material leads to self-diffraction of laser beam and formation a filamentary structure. We fabricated two kinds of graphitized lines. The first type is a straight line extended in the direction of the laser beam. This type of lines was created by femtosecond laser scanning without pulse overlapping. The second type of graphitized lines is curved lines, which was created by scanning with a significant overlapping of focal spot. We determined conditions of the formation of straight graphitized lines by one femtosecond pulse with diameter about 2 pm and length greater than 1 mm in polycarbonate samples. Mechanism of formation and potential applications of these structures are also discussed.