Refractive index of CdGeP2 (Cadmium germanium phosphide)

Optical constants of CdGeP₂ (Cadmium germanium phosphide)
Boyd et al. 1972: n(o) 0.8–12.5 µm; 118 °C

Wavelength: µm

(0.8–12.5)

Complex refractive index (n+ik)[ i ]

Derived optical constants

Dispersion formula [ i ]

$$n^2-1=5.3737+\frac{3.9281λ^2}{λ^2-0.2269}+\frac{1.6686λ^2}{λ^2-671.33}$$

Comments

Ordinary ray (o); 118 °C

References

1) G. D. Boyd, E. Buehler, F. G Storz, J. H. Wernick. Linear and nonlinear optical properties of ternary A^IIB^IVC₂^V chalcopyrite semiconductors, IEEE J. Quant. Electron., 8, 419-426 (1972)
2) G. C. Bhar and G. Ghosh. Temperature-dependent Sellmeier coefficients and coherence lengths for some chalcopyrite crystals, J. Opt. Soc. Am. 69, 730-733 (1979)
*Ref. 2 provides a dispersion formula based on data from Ref. 1

Data

[Expressions for n] [CSV - comma separated] [TXT - tab separated] [Full database record]

Optical transmission calculator

Wavelength: µm
Thickness:
Calculation method:

Transmittance[ i ]

T =

LogX LogY eV

Reflection calculator

Wavelength: µm
Angle of incidence (0~90°):
Direction: in out

Reflectance[ i ]

P-polarized

R_P =

S-polarized

R_S =

Non-polarized (Rp+Rs)/2

R =

R_P R_S R LogY

Reflection phase[ i ]

ɸ_P = °
ɸ_S = °

Brewster's angle[ i ]

θ_B = °

Critical angle[ i ] [ i ]

θ_C = °

INFO

Cadmium germanium phosphide, CdGeP₂

Cadmium germanium phosphide (CdGeP₂) is an inorganic compound that crystallizes in a chalcopyrite-type structure. This material has gained attention for its unique nonlinear optical properties, particularly its phase-matching capabilities and significant nonlinear optical coefficients. CdGeP₂ is often used in frequency conversion applications, including second-harmonic generation and parametric oscillation, predominantly in the mid-infrared spectral range. Its large bandgap and good thermal stability make it suitable for high-temperature and high-power applications. However, the presence of toxic cadmium calls for careful handling and may limit its broader use. Synthesis methods for CdGeP₂ include Bridgman-Stockbarger and Czochralski techniques, which aim to produce high-quality single crystals for specialized optical applications. Despite the environmental and handling challenges posed by its toxic components, CdGeP₂ remains an attractive material for advanced nonlinear optical applications and continues to be the subject of ongoing research.

RefractiveIndex.INFO

Optical constants of CdGeP₂ (Cadmium germanium phosphide)
Boyd et al. 1972: n(o) 0.8–12.5 µm; 118 °C

Complex refractive index (n+ik)[ i ]

Refractive index[ i ]

Extinction coefficient[ i ]

Derived optical constants

Relative permittivity (dielectric constants)[ i ] [ i ]

Absorption coefficient[ i ] [ i ]

Abbe number[ i ]

Chromatic dispersion[ i ]

Group index[ i ] [ i ]

Group velocity dispersion[ i ] [ i ] [ i ]

Dispersion formula [ i ]

Comments

References

Data

Optical transmission calculator

Transmittance[ i ]

Reflection calculator

Reflectance[ i ]

P-polarized

S-polarized

Non-polarized (Rp+Rs)/2

Reflection phase[ i ]

Brewster's angle[ i ]

Critical angle[ i ] [ i ]

INFO

Cadmium germanium phosphide, CdGeP₂

Optical constants of CdGeP2 (Cadmium germanium phosphide)Boyd et al. 1972: n(o) 0.8–12.5 µm; 118 °C

Complex refractive index (n+ik)[ i ]

Refractive index[ i ]

Extinction coefficient[ i ]

Derived optical constants

Relative permittivity (dielectric constants)[ i ] [ i ]

Absorption coefficient[ i ] [ i ]

Abbe number[ i ]

Chromatic dispersion[ i ]

Group index[ i ] [ i ]

Group velocity dispersion[ i ] [ i ] [ i ]

Dispersion formula [ i ]

Comments

References

Data

Optical transmission calculator

Transmittance[ i ]

Reflection calculator

Reflectance[ i ]

P-polarized

S-polarized

Non-polarized (Rp+Rs)/2

Reflection phase[ i ]

Brewster's angle[ i ]

Critical angle[ i ] [ i ]

INFO

Cadmium germanium phosphide, CdGeP2

Optical constants of CdGeP₂ (Cadmium germanium phosphide)
Boyd et al. 1972: n(o) 0.8–12.5 µm; 118 °C

Cadmium germanium phosphide, CdGeP₂