Author Affiliations
1 State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China2 The Extreme Optoelectromechanics Laboratory, School of Physics and Materials Science, East China Normal University, Shanghai 200241, China3 School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, Chinashow less
Fig. 1. (a) Experimental setup for femtosecond laser direct writing with slit shaping; (b) cross section of waveguide fabricated by conventional focusing direct writing; (c) cross section of waveguide fabricated by direct writing with slit shaping[18]
Fig. 2. Simulated light intensity distributions around focal spot with (a) conventional focusing scheme and (b) slit shaped focusing[18]
Fig. 3. Laser intensity distributions at focus of slit-shaped beams. (a) Slit width of 200 μm; (b) slit width of 2000 μm; (c) mouth type with side length of 6 μm; (d) slit width of 160 μm; (e) slit width of 2400 μm; (f) mouth type with side length of 12 μm[29]
Fig. 4. (a) Schematic of experimental setup; (b) square-shaped waveguide; near-field mode light intensity distributions of (c) s-polarized beam and (d) p-polarized beam in the waveguide[29-31]
Fig. 5. Schematic of simultaneous spatial and temporal focusing[34]
Fig. 6. (a)-(c) Simulated light intensity distributions at focus; (d)-(f) cross-sectional optical micrographs of microfluidic channels fabricated by femtosecond laser direct writing[34]
Fig. 7. Cross-sectional optical micrographs in Foturan glass with (a) conventional focusing scheme and (b) simultaneous spatial and temporal focusing (SSTF) scheme; (c) China Pavilion structure written in Foturan glass with SSTF scheme[36]
Fig. 8. (a) Schematic of setup for femtosecond laser SSTF 3D printing; (b) resolution control in SSTF 3D printing
Fig. 9. Two-photon printed image obtained by femtosecond laser SSTF. (a) Scanning electron microscope (SEM) image of 2 mm high Chinese lion sculpture; (b) digital photo of 13 mm high Terra Cotta Warrior sculpture[40]
Fig. 10. (a)(b) Cross-sectional images with chirped pulse direct writing; (c)(d) cross-sectional images with conventional focusing direct writing; (e)(f) cross-sectional images and top views of corroded microcirculation channel[50]
Fig. 11. (a) Bessel beam generated with an axicon and its intensity distribution; (b) high aspect ratio nano-channel SEM image fabricated in glass with Bessel beam[53]
Fig. 12. (a) Phase plate shaped Bessel beam and its light intensity distribution; (b) structural diagram of phase plate; cross-sectional SEM images of TSV fabricated with (c) Gaussian beam, (d) conventional Bessel beam, (e) BPP 1-shaped Bessel beam by and (f) BPP 2-shaped Bessel beam[54]