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Table 1 Input data for ZnGeP2

From: Dispersion of Phonon Surface Polaritons in ZnGeP2: Anisotropy and Temperature Impacts

  B 2 modes
4 K 300 K
ε 10.68 ε 10.04
ν L , cm−1 γ L , cm−1 ν T , cm−1 γ T , cm−1 ν L , cm−1 γ L , cm−1 ν T , cm−1 γ T , cm−1
1 362 2.0 343 1.9 361 2.1 340 3.5
2 412 2.2 403 1.1 409 2.8 400 1.8
  E modes
4 K 300 K
ε 10.05 ε 10.04
ν L , cm−1 γ L , cm−1 ν T , cm−1 γ T , cm−1 ν L , cm−1 γ L , cm−1 ν T , cm−1 γ T , cm−1
1 205 12.0 205 16.0 203 5.7 203 6.8
2 334 5.8 329 3.6 332 4.8 328 6.2
3 378 2.4 371 0.9 375 2.1 368 0.7
4 403 1.5 388 1.1 399 2.7 385 1.3