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Related Experiment Video

Updated: Jul 16, 2026

Epitaxial Nanostructured α-Quartz Films on Silicon: From the Material to New Devices
11:34

Epitaxial Nanostructured α-Quartz Films on Silicon: From the Material to New Devices

Published on: October 6, 2020

Enhancing Quartz Infrared Absorption by Tuning Femtosecond Laser Surface Texturing Patterns.

Isabella Petruzzellis1, Raffaele De Palo2, Andrea Zifarelli3

  • 1Chemistry Department, Università degli Studi di Bari, Via Orabona 4, 70126 Bari, Italy.

Materials (Basel, Switzerland)
|July 15, 2026
PubMed
Summary

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Femtosecond laser surface texturing transforms quartz into "black quartz" for infrared photodetection. Crater arrays effectively reduce light transmittance, enabling broadband infrared sensing applications.

Area of Science:

  • Materials Science
  • Optoelectronics
  • Laser Physics

Background:

  • Quartz possesses excellent properties for optoelectronic and sensing applications.
  • Its transparency above 5 μm hinders its use in near- and mid-infrared photodetection.
  • Laser surface texturing offers a method to create 'black quartz' and overcome transparency limitations.

Purpose of the Study:

  • To investigate femtosecond (fs) laser surface texturing strategies on quartz.
  • To enhance quartz's light absorption for infrared photodetection.
  • To develop a maskless and chemical-free surface functionalization method.

Main Methods:

  • Uniform milling, grid-patterned grooves, and localized crater arrays were created using fs laser texturing on a 1 mm thick α-quartz wafer.
Keywords:
blackeningfemtosecond laserquartz

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  • Transmittance was measured across the infrared spectrum to evaluate blackening performance.
  • Surface morphology was analyzed to understand light absorption mechanisms.

    • Main Results:

    • Fs-laser-treated quartz exhibited a transmittance reduction of up to 60% in the infrared range.
    • Crater matrices demonstrated the most effective blackening.
    • Enhanced absorption was linked to light-trapping effects from tapered crater geometry and increased optical confinement.

    Conclusions:

    • Fs laser texturing is a viable strategy for fabricating black quartz substrates.
    • Crater arrays provide superior light absorption for broadband infrared photodetection.
    • This maskless, chemical-free method enables advanced quartz-based sensing applications.