2 Ultrafast Laser Enabling Versatile Fabrication of Surface …
81
Fig. 2.5 Color effects (on the right) resulting from controlled nanostructures formed by fs laser
irradiation on stainless steel surface; SEM images (on the left) of controlled nanostructures with
two different orientations. Reproduced from [39] with permission from The Optical Society
dimension varied counterparts for exciting resonance in ε and μ individually [45,
46]. In addition to that, various novel light-harvesting strategies are still emerging
for now [47–50].
It is well known that landmark achievement on antireflection research has been
achieved by the coatings of vertically aligned carbon nanotubes, reaching ultralow
reflectance (<1%) over ultrabroadband spectrum ranges (from UV to far-infrared)
[51, 52]. Besides, we have talked in Sect. 2.2.1 that by fabricating nanotip arrays on
silicon surfaces, ultrabroadband light harvesting over the UV to THz spectrum ranges
has also been realized. Compared to that, however, the research on antireflection
properties of metal surfaces is still unsatisfactory. Surface engineering methods to
reach antireflection on metal surfaces, meeting both broadband effectiveness and
ultralow reflectance requirements, are still in great need.
From the viewpoint of micro-nano structure manufacturing, great challenges
exist in the designable, predictable, controllable, as well as scalable fabrication of
surface micro-nano structures until now. Beyond that, it is the continuous pursuit
of researchers to further develop general strategies and techniques for fabricating
surface micro-nano structures on various materials.
Based on this background, our research is aiming to tune the light manipulation
properties of metal surface via SMNS constructed by the new generation high repetition rate high power ultrafast lasers (ps and fs). Correspondingly, the following
sections will introduce in detail the recent progresses we achieve on the fabrication,
functionalization, and application of metal surface micro-nano structures.
81
Fig. 2.5 Color effects (on the right) resulting from controlled nanostructures formed by fs laser
irradiation on stainless steel surface; SEM images (on the left) of controlled nanostructures with
two different orientations. Reproduced from [39] with permission from The Optical Society
dimension varied counterparts for exciting resonance in ε and μ individually [45,
46]. In addition to that, various novel light-harvesting strategies are still emerging
for now [47–50].
It is well known that landmark achievement on antireflection research has been
achieved by the coatings of vertically aligned carbon nanotubes, reaching ultralow
reflectance (<1%) over ultrabroadband spectrum ranges (from UV to far-infrared)
[51, 52]. Besides, we have talked in Sect. 2.2.1 that by fabricating nanotip arrays on
silicon surfaces, ultrabroadband light harvesting over the UV to THz spectrum ranges
has also been realized. Compared to that, however, the research on antireflection
properties of metal surfaces is still unsatisfactory. Surface engineering methods to
reach antireflection on metal surfaces, meeting both broadband effectiveness and
ultralow reflectance requirements, are still in great need.
From the viewpoint of micro-nano structure manufacturing, great challenges
exist in the designable, predictable, controllable, as well as scalable fabrication of
surface micro-nano structures until now. Beyond that, it is the continuous pursuit
of researchers to further develop general strategies and techniques for fabricating
surface micro-nano structures on various materials.
Based on this background, our research is aiming to tune the light manipulation
properties of metal surface via SMNS constructed by the new generation high repetition rate high power ultrafast lasers (ps and fs). Correspondingly, the following
sections will introduce in detail the recent progresses we achieve on the fabrication,
functionalization, and application of metal surface micro-nano structures.