Optical constants of AlAs-GaAs (Aluminium gallium arsenide, AlGaAs)
Perner et al. 2023: n 2.0–7.1 µm; 92.9% Al
Wavelength:
µm
(2–7.1)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{7.214199525964231λ^2}{λ^2-0.26714974883257975^2}$$Conditions & Spec sheet
n_is_absolute: true wavelength_is_vacuum: true temperature: 22 °C
Comments
Al0.929Ga0.071As (interpolation for other alloy ratios possible). Relative standard uncertainty ≤3.3×10-4 over whole range. Measured in a high-purity GaAs/AlGaAs crystalline thin-film multilayer. Sample grown via molecular beam epitaxy on GaAs seed wafer. Optical measurements at 2.21 mbar and 22 °C.
References
L. W. Perner, G.-W. Truong, D. Follman, M. Prinz, G. Winkler, S. Puchegger, G. D. Cole, O. H. Heckl. Simultaneous measurement of mid-infrared refractive indices in thin-film heterostructures: Methodology and results for GaAs/AlGaAs, Phys. Rev. Res. 5, 033048 (2023) (Data kindly provided by the authors)
Data
INFO
Aluminium gallium arsenide, AlGaAs
Other name
- Aluminum gallium arsenide