Table 2. Position and fwhm of the E2 (high) Mode and Residual Stress in AlN Crystals.
sample | E2 (high) (cm–1) | fwhm (cm–1) | residual stress (MPa) |
---|---|---|---|
S1 | 656.88 | 4.43 | –141 |
S2 | 656.02 | 13.74 | –373 |
S3 | 657.47 | 15.22 | 19 |
S4 | 656.47 | 70.60 | 19 |
S5 | 657.00 | 15.22 | –108 |