Fabrication of self-ruled micro grating on CR-39 using ArF laser-induced rippling

Abstract

The excimer laser at 193 nm induces regular self-assembled microstructures on poly allyl diglycol carbonate PADC (or CR-39). This surface rippling is threshold-dependent and undergoes different features at low/high UV fluences. The microstructures are characterized by small/large aspect ratios (0.056-0.226) at low/high UV fluences of 40-1000 mJ cm −2 . The self-aligning micro grooves show a strong sensitivity to the incident angles. As a consequence, the parameter of the fluence threshold drastically reduces in terms of the large incident angles, leading to parallelism over a broad treated area. In fact, the self-rippling at high UV fluences aligns with P-polarization of the incident beam. Conversely, the pattern appears in the orientation of the S-polarization under low fluences. This unique property of CR-39 is used to fabricate the micro gratings of 250-2900 lines mm −1 , which certainly meets the criteria for high efficiency at small aspect ratios.

PC12 transformation to neuron cells activated by low-level laser at 660 nm on the UV pre-treated CR-39 scaffolds with parallel microchannels

“…ArF excimer laser at 193nm bene ts the following properties, i.e. 15 nsec duration and spatial distribution of ∼1 cm × 1 cm with transverse and vertical divergence of 1 and 3 mrad in orthogonal directions respectively [38][39][40][41] . Fig.…”

Analysis of Surface Texturing of Silicon with Surface Regular Microstructure Using C Method

“…The reflection of the microstructures is obtained using method C. Moreover, the creation of regular microstructures by the ArF excimer laser on the polymer surface of the solar cell attests to a decrease in spectral reflection alongside the flattening of the spectral reflection. This causes to enhance the efficiency of the solar cell by ~1% [15][16][17][18][19]. Moreover, the ZnO nanowires contribute to enhancing solar cell efficiencies due to UV-blue spectral downshifting [20,21].…”