Enhancing Quartz Infrared Absorption by Tuning Femtosecond Laser Surface Texturing Patterns.
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| Title: | Enhancing Quartz Infrared Absorption by Tuning Femtosecond Laser Surface Texturing Patterns. |
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| Authors: | Petruzzellis, Isabella1 (AUTHOR), De Palo, Raffaele2 (AUTHOR) raffaele.depalo@poliba.it, Zifarelli, Andrea3 (AUTHOR), Patimisco, Pietro3,4 (AUTHOR), Sfregola, Felice Alberto3,5 (AUTHOR), Caragnano, Stefania1,3,5 (AUTHOR), Gaudiuso, Caterina2,5 (AUTHOR), Mezzapesa, Francesco Paolo3,5 (AUTHOR), Spagnolo, Vincenzo2,4 (AUTHOR), Ancona, Antonio3,5 (AUTHOR), Volpe, Annalisa2,5 (AUTHOR) |
| Source: | Materials (1996-1944). Jul2026, Vol. 19 Issue 13, p2810. 12p. |
| Subjects: | Infrared absorption, Surface texture, Laser ablation, Femtosecond lasers, Photodetectors, Optoelectronics, Quartz, Light absorption |
| Abstract: | Quartz is widely employed in optoelectronic and sensing applications owing to its excellent mechanical and chemical properties. However, its intrinsic transparency up to 5 μm limits its direct use as a photodetection substrate across the near- and mid-infrared spectral regions. Laser surface texturing for the fabrication of the so-called black quartz represents a promising strategy to overcome this limitation. In this work, different femtosecond (fs) laser texturing strategies were investigated on a 1 mm thick α-quartz wafer, namely uniform milling, grid-patterned grooves, and localized arrays of ablated craters. The fs-laser-treated quartz samples showed a transmittance reduction of up to 60% within the quartz transparency window in the infrared range, with crater matrices providing the most effective blackening performance. The enhanced absorption was attributed to light-trapping effects induced by the tapered crater geometry, which promotes multiple internal reflections and increased optical confinement within the substrate. The proposed strategy demonstrates a reliable, maskless, and chemical-free surface functionalization strategy for the fabrication of quartz-based substrates for broadband infrared photodetection in sensing applications. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | Quartz is widely employed in optoelectronic and sensing applications owing to its excellent mechanical and chemical properties. However, its intrinsic transparency up to 5 μm limits its direct use as a photodetection substrate across the near- and mid-infrared spectral regions. Laser surface texturing for the fabrication of the so-called black quartz represents a promising strategy to overcome this limitation. In this work, different femtosecond (fs) laser texturing strategies were investigated on a 1 mm thick α-quartz wafer, namely uniform milling, grid-patterned grooves, and localized arrays of ablated craters. The fs-laser-treated quartz samples showed a transmittance reduction of up to 60% within the quartz transparency window in the infrared range, with crater matrices providing the most effective blackening performance. The enhanced absorption was attributed to light-trapping effects induced by the tapered crater geometry, which promotes multiple internal reflections and increased optical confinement within the substrate. The proposed strategy demonstrates a reliable, maskless, and chemical-free surface functionalization strategy for the fabrication of quartz-based substrates for broadband infrared photodetection in sensing applications. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 19961944 |
| DOI: | 10.3390/ma19132810 |
