Evaluation of stress in (111) homoepitaxial CVD diamond films by Raman spectrum and nitrogen-vacancy centers

Autor: T. Tsuji, C. Shinei, T. Iwasaki, M. Hatano, T. Teraji
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Applied Physics Express, Vol 17, Iss 11, p 115502 (2024)
Druh dokumentu: article
ISSN: 1882-0786
DOI: 10.35848/1882-0786/ad88d4
Popis: The reduction of inhomogeneous stress in diamonds is crucially important for extracting excellent performance of semiconducting diamonds. In this study, to investigate elastic deformation in nitrogen doped (111) diamond films caused by stress, we evaluated the stress in these films using confocal Raman microscopy. The stress was detectable when the misorientation angle ( ${\theta }_{{\rm{mis}}}$ ) was below 3.7° and it decreased as ${\theta }_{{\rm{mis}}}$ increased. The Raman spectroscopic measurements, considered together with reported stress measurements by nitrogen-vacancy centers, suggest that the diamond film at low ${\theta }_{{\rm{mis}}}$ was subjected to compressive stresses that were stronger in the [111] direction than [ $1\mathop{1}\limits^{\unicode{773}}0$ ] or [ $\mathop{1}\limits^{\unicode{773}}\mathop{1}\limits^{\unicode{773}}2$ ] directions.
Databáze: Directory of Open Access Journals