NSM Archive - Diamond (C) - Optical properties
Optical properties
| Index of refraction | 2.4 |
| Radiative recombination coefficient | 9·105cm3/s |
Infrared refractive index n=2.375.
At 300 K:
dn/dT=4.04·10-6·n K-1
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Type IIa diamond refractive index versus wavelength. Experimental points: data from four references (Edwards and Ochoa [1981]). |
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Type IIa diamond refractive index versus photon energy at 300 K. (Walker and Osantowski [1964]). |
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Reflectance versus photon energy, 300 K. (Walker and Osantowski [1964]). |
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Absorption edge spectrum of diamond at various temperatures. (Clark et al. [1964]). |
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Visible and ultraviolet absorption spectra of a diamond with different types of impurities. Predominant type of impurity is: 1. boron atoms; 2. N3 centers; 3. single nitrogen atoms; 4. absorption spectra of a brown diamond. (Wilks and Wilks [1991]). |
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Infrared absorption spectra of a diamond in which 1. boron atoms are predominant impurities; 2. single nitrogen atoms are predominant impurities (Wilks and Wilks [1991]). |
Two-photon absorption coefficient β for IIa diamond (ρ=1014-1016 Ω cm))
| λ | τp, ns | β×1011, m W-1 |
| 0.248 | 0.0005 | 1.6±0.3 |
| 0.31 | 0.000135 | 0.75±0.15 |
| 0.3547 | 0.015 | 0.3 |
| 0.5321 | 0.03 | <0.26 |