=5.06
=6.85
to c axis4.95
perpendicular to c axis
for 300 K;
see also Dielectric functions
= 2.2;=4.34.46
Rumyantsev et al. (2001)
1.65
2.13
perpendicular to c axis
parallel to c axis
Ishii et al. (1983)
Ishii et al. (1983)
| Remarks | Referens | ||
| Dielectric constant (static) | 7.1 | 300 K, infrared reflectivity | Gielisse et al.(1967) |
| Dielectric constant (high frequency) | 4.5 4.46 |
300 K, infrared reflectivity | Gielisse et al.(1967) Rumyantsev et al. (2001) |
| Refractive index, n | 2.17 | 300 K, wavelegth 0.589mm | Gielisse et al.(1967) |
| Infrared refractive index | ~=2.1 | 300 K, Infrared | Rumyantsev et al. (2001) |
| Optical phonon energy | ~130 meV | 300 K |
Rumyantsev et al. (2001) |
| Remarks | Referens | ||
| Dielectric constant (static) | =5.06=6.85 |
|| to c axis to c axis |
Geick et al.(1966) |
| Dielectric constant (high frequency) | 4.10 4.95 |
parallel to c axis perpendicular to c axis for 300 K; see also Dielectric functions |
Geick et al.(1966) |
| = 2.2;=4.3 |
300 K | Rumyantsev et al. (2001) | |
| Dielectric constant (static) | 7.1 | 300 K, infrared reflectivity | Gielisse et al.(1967) |
| Dielectric constant (high frequency) | 4.5 4.46 |
300 K, infrared reflectivity | Gielisse et al.(1967) Rumyantsev et al. (2001) |
| Refractive index, n | 1.65 1.65 2.13 |
BN- film perpendicular to c axis parallel to c axis |
Takahashi et al.(1981) Ishii et al. (1983) Ishii et al. (1983) |
| Infrared refractive index | ~=1.8 | 300 K, Infrared | Rumyantsev et al. (2001) |
| BN, hexagonal. Ordinary and extraordinary dielectric functions e2 vs.
wavelength and photon energy in the range 13---30eV (b). Mamy et al. (1983) |
| Crystal structure | Wurtzite | Zinc Blende | Hexagonal |
| Infrared refractive index | ~=2.05 | ~=2.1 | ~=1.8 |
 |
BN, hexagonal. Ordinary and extraordinary dielectric functions
e2 vs. wavelength and photon energy
in the range 5--9eV Mamy et al. (1981) |
 |
BN, hexagonal. Ordinary and extraordinary dielectric functions
e2 vs. wavelength and photon energy
in the range 13--30eV Mamy et al. (1981) |
 |
BN, zinc blende. Refractive index n versus photon energy Miyata et al. (1989) |
 |
BN. Refractive index n versus wavenumber. 1 -- Zinc blende 2 -- Hexagonal BN. Stenzel et al. (1996) |
 |
BN, Wurtzite. Reflectance R as a function of photon energy
for two samples. 1, 500oC annealed; 2, 100o C annealed (nanoscale powder compacted into dense solid under high pressure). Yixi et al. (1994) |
 |
BN, Zinc Blende. Reflectance R as a function of photon energy.
Miyata et al. (1989) |
 |
BN, Hexagonal. Reflectance R as a function of wavelength . Zunger et al. (1976) |
 |
BN, Hexagonal. Reflectance R as a function of wavelength . Hoffman et al. (1984) |
 |
BN, Wurtzite. The absorption coefficient as a function of photon energy
for two samples. 1, 500oC annealed; 2, 100oC annealed (nanoscale powder compacted into dense solid under high pressure). Yixi et al. (1994) |
 |
BN, Zinc Blende. The absorption coefficient versus photon energy. Miyata et al. (1989) |
 |
BN, Zinc Blende. The absorption coefficient versus photon energy
at different hydrostatic pressures. The energies shown by arrows are defined
as indirect band gaps. Onodera et al. (1993) |
 |
BN, Zinc Blende. The absorption coefficient versus wavenumber in
the infrared. Chrenko et al. (1974) |
 |
BN, Hexagonal. The absorption coefficient versus wavelength. 300K.
Zunger et al. (1976) |
 |
BN, Hexagonal. The absorption coefficient versus wavelength at
4.2 K and 600 K. Zunger et al. (1976) |
|
|