Fabrication of a two-dimensional periodic microflower array by three interfered femtosecond laser pulses on Al:ZnO thin films
نویسندگان
چکیده
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 different laser fluences and irradiation times was analyzed. Theoretical analysis indicates that the interferential intensity and polarization distribution together account for the formation of microflowers with subwavelength petals. Flower periodicity with a period of microns was determined by the interferential intensity distribution, while nanopetal structures and their orientations were attributed to the interferential polarization distribution. 3 Authors to whom any correspondence should be addressed. New Journal of Physics 12 (2010) 043025 1367-2630/10/043025+08$30.00 © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft
منابع مشابه
Femtosecond laser rapid fabrication of large-area rose-like micropatterns on freestanding flexible graphene films
We developed a simple, scalable and high-throughput method for fabrication of large-area three-dimensional rose-like microflowers with controlled size, shape and density on graphene films by femtosecond laser micromachining. The novel biomimetic microflower that composed of numerous turnup graphene nanoflakes can be fabricated by only a single femtosecond laser pulse, which is efficient enough ...
متن کاملFabrication of TiO2-Organic Hybrid Dot Arrays Using Nanosecond Laser Interference Lithography
Laser interference lithography is an established fabrication technique for periodic arrays such as photonic crystals (PCs). In this paper, we report the fabrication of a TiO2-organic hybrid periodic array by nanosecond laser interference lithography. TiO2organic hybrid films were prepared from titanium tetra-n-butoxide and 2-(methacryloyloxy) ethyl acetoacetate (MEAcAc) by the sol–gel method. T...
متن کاملObservation of supercurrent distribution in YBa2Cu3O72d thin films using THz radiation excited with femtosecond laser pulses
We have demonstrated that the supercurrent distribution in current-biased YBa2Cu3O72d thin films can be obtained by measuring the radiation power of THz electromagnetic pulses excited with femtosecond laser pulses. As the radiation power is proportional to the square of the bias current density at the laser spot position, the two-dimensional current distribution can be obtained from the intensi...
متن کاملFemtosecond laser interference technique with diffractive beam splitter for fabrication of three-dimensional photonic crystals
A simple optical interference method to fabricate microperiodic structures was demonstrated. Femtosecond laser pulse was split by a diffractive beam splitter and overlapped with two lenses. Temporal overlap of the split femtosecond pulses, which requires 10 mm order accuracy in optical path lengths, was automatically achieved by this optical setup. One-, two-, and three-dimensional periodic mic...
متن کامل