Refractive index database

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Optical constants of Eu (Europium)
Fernández-Perea et al. 2008: n,k 0.000883–0.149 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Conditions & Spec sheet

n_is_absolute: true
wavelength_is_vacuum: true


Density: 5.25 g/cm3. Film deposited at room temperature.


M. Fernández-Perea, M. Vidal-Dasilva1, J. A. Aznárez, J. I. Larruquert, J. A. Méndez, L. Poletto, D. Garoli, A. M. Malvezzi, A. Giglia and S. Nannarone. Transmittance and optical constants of Eu films from 8.3 to 1400 eV, J. Appl. Phys. 104, 123527 (2008) (Numerical data kindly provided by Juan Larruquert)


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Europium, Eu

Europium (Eu) is a rare-earth element that is widely used as a phosphor in flat-panel displays, fluorescent lamps, and in various other optoelectronic applications. Its distinct red and blue luminescence make it valuable for use in red and blue phosphors. The element can be incorporated into glasses and crystals to create materials with enhanced luminescent properties. Europium-doped materials are particularly important in the creation of lasers and optical amplifiers. Additionally, europium compounds are often used in the field of magneto-optics. While europium itself is not typically used in its elemental form in optical systems, its compounds and doped materials play a crucial role in modern optoelectronics.

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