Generation of microstructures and extreme sub-wavelength laser-induced periodic structures on the Si surface using $$\hbox {N}_{2}$$ nanosecond pulsed laser for the reduction of reflectance
| Autor: | P. Chandrakanta Singh, Susanta Kumar Das |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Silicon 010308 nuclear & particles physics Analytical chemistry General Physics and Astronomy chemistry.chemical_element Nanosecond Laser 01 natural sciences 010305 fluids & plasmas law.invention Wavelength chemistry law 0103 physical sciences Irradiation Specular reflection Nitrogen laser Diffuse reflection |
| Zdroj: | Pramana. 95 |
| ISSN: | 0973-7111 0304-4289 |
| Popis: | A detailed study is done on the growth of microstructures and sub-wavelength laser-induced periodic surface structures (LIPSSs) on silicon (Si) surface using nitrogen ( $$\hbox {N}_{2})$$ nanosecond (ns) laser processing in air. The period of LIPSS is found to be as small as 37 nm which is close to $$\lambda /9$$ times the irradiated laser wavelength (337 nm). In the optimised condition the sums total of reflectance (specular reflectance $$+$$ diffuse reflectance) was found to be as low as 10% for a broad wavelength range. The reflectance behaviour has been correlated with the morphology of the generated microstructures. |
| Databáze: | OpenAIRE |
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