Refractive index database

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Optical constants of ZnGeP2 (Zinc germanium phosphide, ZGP)
Das et al. 2003: n(e) 1.32–11 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]



Extraordinary ray (e)


S. Das et al.. Linear and nonlinear optical properties of ZnGeP2 crystal for infrared laser device applications: Revisited, Appl. Opt. 42, 4335-4340 (2003)


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


Zinc germanium phosphide, ZnGeP2 (ZGP)

Zinc germanium phosphide (ZnGeP2, ZGP), is a non-linear optical material that has been widely used for frequency conversion in the mid-infrared range. It possesses a broad transparency range, high damage threshold, and phase-matching capabilities, making it a favored choice for a variety of laser applications. Owing to its ability to efficiently generate coherent radiation in the 2 to 12 µm spectral range, ZGP is especially relevant for molecular spectroscopy, environmental monitoring, and medical surgery. As a non-centrosymmetric crystal, ZGP can be employed for second harmonic generation, parametric oscillation, and other non-linear processes when exposed to suitable pump sources.

Other name

  • Zinc germanium diphosphide

External links