Optical constants of ZnGeP2 (Zinc germanium phosphide, ZGP)
Zelmon et al. 2001: n(o) 2–9 µm
Complex refractive index (n+ik)
Derived optical constants
Dispersion formula
$$n^2-1=7.0409+\frac{1.68625λ^2}{λ^2-0.40824}+\frac{0λ^2}{λ^2-1.2880}+\frac{1λ^2}{λ^2-611.05}$$Comments
Ordinary ray (o); 21-22 °C.
References
D. E. Zelmon, E. A. Hanning, P. G. Schunemann. Refractive-index measurements and Sellmeier coefficients for zinc germanium phosphide from 2 to 9 µm with implications for phase matching in optical frequency-conversion devices. J. Opt. Soc. Am. B 18, 1307-1310 (2001)
Data
Additional information
About Zinc germanium phosphide
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 names and variations:- ZnGeP2
- ZGP
- Zinc germanium diphosphide