Refractive index database

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Optical constants of Y3Al5O12 (Yttrium aluminium garnet, YAG)
Hrabovský et al. 2021: n 0.193–1.69 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]



J. Hrabovský, M. Kučera, L. Paloušová, L. Bi, M. Veis. Optical characterization of Y3Al5O12 and Lu3Al5O12 single crystals, Opt. Mater. Express 11, 1218-1223 (2021)


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


Yttrium aluminium garnet, Y3Al5O12 (YAG)

Yttrium aluminium garnet (Y3Al5O12, YAG) is a synthetic crystalline material frequently employed in a variety of applications. It possesses a unique combination of high thermal stability, mechanical robustness, and optical clarity, making it particularly desirable for high-performance environments. In the realm of optics and photonics, YAG is often used as the host crystal in solid-state lasers, most notably the Nd:YAG laser where the YAG crystal is doped with neodymium. These lasers are employed in a range of settings, from medical procedures to material processing. Additionally, undoped YAG is a common substrate for various thin-film applications, given its compatibility with high-temperature deposition processes. In the lighting sector, YAG, when doped with cerium, is used as a phosphor in white LED technology.

Other names

  • Yttrium aluminate
  • Yttrium aluminium oxide

External links