Research status and application prospects of manufacturing technology for micro–nano surface structures with low reflectivity

Abstract

The light trapping surface of micro-nanostructure can significantly improve the performance of optical transmission and can greatly reduce the broadband domain of material surface reflectivity, which means the material surface absorptivity on wide-spectrum signal is enhanced. Several commonly used methods for manufacturing micro-nano surface of light trapping structure with low reflectivity are introduced first, including chemical etching, mechanical grooving, reactive ion etching, common long-pulse laser grooving, and ultra-fast pulse laser processing. This is followed by a comparison of the advantages and disadvantages of these methods. Among these methods, ultra-fast pulse laser processing is an ideal manufacturing technology for fabrication of light trapping structures. The research status of the micro-nano manufacturing technology of structured surfaces for light trapping with low reflectivity is reviewed, and emphasis is given to their application prospects. The research directions and trends of the micro-nano manufacturing technology of structured surfaces for light trapping with low reflectivity are summarized, and broad application prospects and research value in many fields, such as solar cells, solar water heater, building wave-absorbing materials, information acquisition of mechanized equipments, high-radiation heat exchange equipment, solar heating equipment, and solar air conditioner, are pointed out.

Surface ablation and threshold determination of AlCu4SiMg aluminum alloy in picosecond pulsed laser micromachining

“…Ultrafast pulsed laser ablation exhibits many unique processing advantages, such as high ablation precision and efficiency, more controllable, minimal processing size, and almost no thermal damage and boundary effect, by virtue of its extremely short pulse duration and very high peak energy [4][5][6]. There is increasing evidence that high precision processing using ultrafast pulsed laser with pulse widths in the picosecond to femtosecond time ranges demonstrates a significant improvement in quality of various materials such as metals in comparison to nanosecond or longer pulse laser processing [5][6][7][8][9], thus making ultrafast pulsed laser processing an advanced tool with numerous underlying applications for high-quality material micronanomachining [7,9]. AlCu4SiMg aluminum alloy as technically important metal is a heat-treatable reinforced high-strength forging aluminum alloy.…”

Spectral analysis of surface roughness and form profile of a machined surface after low pressure lapping

“…16,17 The spatial distribution of surface profile presented is spatial amplitudes versus spatial periods. 18,19 The spatial amplitudes are expressed as the FFT signals here as shown in Figure 3; the length of this cycle, L (2 π / ω ), is called the spatial period, and the spatial frequency of variation is the reciprocal of the spatial period (1/ L ).…”

Design and Fabrication of Dual-Scale Broadband Antireflective Structures on Metal Surfaces by Using Nanosecond and Femtosecond Lasers

“…Due to their excellent performance in surface antireflection, such hierarchical structures have been applied in various fields, such as artificial blackbodies, photodetectors, infrared imaging, stray light shields, space-borne optics, etc. [13][14][15][16].…”