Refractive index database

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Optical constants of CaGdAlO4 (Calcium gadolinium aluminate, CALGO)
Loiko et al. 2017: n(o) 0.35–2.1 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]



Ordinary ray (o); room temperature.


P. Loiko, P. Becker, L. Bohatý, C. Liebald, M. Peltz, S. Vernay, D. Rytz, J. M. Serres, X. Mateos, Y. Wang, X. Xu, J. Xu, A. Major, A. Baranov, U. Griebner, V. Petrov. Sellmeier equations, group velocity dispersion, and thermo-optic dispersion formulas for CaLnAlO4 (Ln = Y, Gd) laser host crystals, Opt. Lett., 42, 2275–2278 (2017)


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Calcium gadolinium aluminate, CaGdAlO4 (CALGO)

Calcium gadolinium aluminum oxide (CaGdAlO4), commonly abbreviated as CALGO, is a crystalline material that has attracted interest for its optical and scintillating properties. It crystallizes in an orthorhombic structure and is characterized by high thermal stability, making it suitable for high-temperature applications. CALGO is known for its high light yield, fast decay time, and low afterglow, which makes it an attractive candidate for scintillator applications in radiation detection and medical imaging. Additionally, its transparency over a wide wavelength range and good mechanical properties have led to its exploration in the fabrication of optical components like lenses and waveguides. CALGO can be synthesized through various techniques, such as solid-state reactions and flux growth, allowing for tunability in its optical properties through doping or compositional adjustments. Overall, the unique combination of optical, thermal, and mechanical characteristics makes CALGO a promising material for a range of applications in optics, photonics, and radiation detection.