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6CCVD Research

The Influence of Crystal Anisotropy in Femtosecond Laser Processing of Single-Crystal Diamond

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2025-07-28
JournalNanomaterials
AuthorsGehui Wang, Ji Wang, Kaijie Cheng, Kun Yang, Bojie Xu
InstitutionsNingbo University, Zhejiang University of Technology

Abstract

Section titled ā€œAbstractā€

The single-crystal diamond (SCD), owing to its extreme physical and chemical properties, serves as an ideal substrate for quantum sensing and high-frequency devices. However, crystal anisotropy imposes significant challenges on fabricating high-quality micro-nano structures, directly impacting device performance. This work investigates the effects of femtosecond laser processing on the SCD under two distinct crystallographic orientations via single-pulse ablation. The results reveal that ablation craters along the <100> orientation exhibit an elliptical shape with the major axis parallel to the laser polarization, whereas those along the <110> orientation form near-circular craters with the major axis at a 45Ā° angle to the polarization. The single-pulse ablation threshold of the SCD along <110> is 9.56 J/cm2, representing a 7.8% decrease compared to 10.32 J/cm2 for <100>. The graphitization threshold shows a more pronounced reduction, dropping from 4.79 J/cm2 to 3.31 J/cm2 (31% decrease), accompanied by enhanced sp2 carbon order evidenced by the significantly intensified G-band in the Raman spectra. In addition, a phase transition layer of amorphous carbon at the nanoscale in the surface layer (thickness of ~40 nm) and a narrow lattice spacing of 0.36 nm are observed under TEM, corresponding to the interlayer (002) plane of graphite. These observations are attributed to the orientation-dependent energy deposition efficiency. Based on these findings, an optimized crystallographic orientation selection strategy for femtosecond laser processing is proposed to improve the quality of functional micro-nano structures in the SCD.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
  1. 2021 - Surface transfer doping of diamond: A review [Crossref]
  2. 2021 - Toward quantitative bio-sensing with nitrogen-vacancy center in diamond [Crossref]
  3. 2021 - Ultrafast nonthermal NV center formation in diamond [Crossref]
  4. 2024 - Diamond-SiC composite substrates: A novel strategy as efficient heat sinks for GaN-based devices [Crossref]
  5. 2022 - GaN-based heterostructures with CVD diamond heat sinks: A new fabrication approach towards efficient electronic devices [Crossref]
  6. 2025 - Ultrafast diamond photodiodes for vacuum ultraviolet imaging in space-based applications [Crossref]
  7. 2021 - Ultrathin diamond nanofilmsā€”Development, challenges, and applications [Crossref]
  8. 2021 - Zirconia responses to edge chipping damage induced in conventional and ultrasonic vibration-assisted diamond machining [Crossref]
  9. 2021 - Hybrid ultrasonic vibration and magnetic field assisted diamond cutting of titanium alloys [Crossref]
  10. 2022 - Polishing of polycrystalline diamond using synergies between chemical and mechanical inputs: A review of mechanisms and processes [Crossref]

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