Spectral enhancement of thermal radiation by laser fabricating grating structure on nickel surface*
Liu Song, Liu Shi-Bing†
       
(a) The schematical diagram of laser processing nickel targets. The grating periods d of the surface are 5 μm, 7 μm, 10 μm, 15 μm, 20 μm. (b) The surface topography of femtosecond laser fabricating grating measured by a scanning electron microscope. Though the fabricating quality of the femtosecond laser direct writing is not as good as lithography and electron beam etching, it has the advantage of being a simple technology and can be used in most materials.