Fabrication of a two-dimensional periodic microflower array by three interfered femtosecond laser pulses on Al:ZnO thin films

Fabrication of a two-dimensional periodic microflower array by three interfered femtosecond laser pulses on Al:ZnO thin films

A two-dimensional periodic microflower array was fabricated on Al:ZnO thin films by the irradiation of three interfered 800 nm femtosecond laser beams. The petals of the microflowers are ∼200 nm in size, and the intervals between the nanopetals are about 100 nm. These values are significantly smaller than the laser wavelength and its diffraction-limited scale. The evolution of microflowers with...

Holographic Fabrication of Periodic Microstructures by Interfered Femtosecond Laser Pulses

Integration of Three-Dimensional Waveguides by Femtosecond Laser Pulses

When femtosecond laser pulses are focused inside the bulk of transparent materials, the refractive-index change can be induced around the focal volume. This technique has been applied to fabricate three-dimensional photonic structures such as waveguides and couplers inside a wide variety of glasses. In this paper, we present fabrication and integration of three-dimensional waveguides in silica ...

Fabrication of three-dimensional electrospun microstructures using phase modulated femtosecond laser pulses

a r t i c l e i n f o Electrospun polycaprolactone nanofibers were selectively ablated to form microstructures via the phase modulation of femtosecond laser beams. Ablation width (1–15 μm) and depth (15–110 μm) resolution were dependent upon the selection of pulse energy and microscope objective. Because phase modulation shapes light in a maskless fashion, desired templates were digitally creat...

Two-color photoemission produced by femtosecond laser pulses on copper

Single-color illumination of a copper surface by a red or an ultraviolet femtosecond laser pulse yields a threephoton (red) or a two-photon (UV) photoemission process. A multicolor, multiphoton process is generated when the red and the UV pulses overlap both in space and in time on the photocathode. It is shown that this emission process results from the absorption by an electron of one red and...