GaN Refractive Index

Name: GaN Refractive Index (n, k)
Creator: Acuitik
License: https://creativecommons.org/licenses/by/4.0/
Keywords: GaN, refractive index, n, k, optical constants, thin film

Optical constants (n, k) of GaN, covering 0.12 – 0.99 μm wavelength range.

Range 0.124 – 0.992 μm

Data Points 500

Optical Constants at Key Wavelengths

632.8 nm (He-Ne)

n = 2.2889

k = 0.0608

589.3 nm (Na-D)

n = 2.3080

k = 0.0643

532 nm

n = 2.3394

k = 0.0701

n, k Dispersion Curves

Data Table (Sampled)

Wavelength (μm)	n	k
0.1240	0.90117	1.48950
0.1267	0.99104	1.57520
0.1294	1.10220	1.64580
0.1323	1.22940	1.68940
0.1354	1.35690	1.69660
0.1386	1.46070	1.67120
0.1419	1.52230	1.63730
0.1454	1.54550	1.63170
0.1491	1.56650	1.68510
0.1530	1.65650	1.78620
0.1570	1.83620	1.81170
0.1613	1.92470	1.75630
0.1659	1.97510	1.80010
0.1707	2.12130	1.88910
0.1758	2.36770	1.92050
0.1812	2.64980	1.82800
0.1869	2.87230	1.61420
0.1930	2.98050	1.35130
0.1996	2.99030	1.11140
0.2066	2.94560	0.92308
0.2141	2.88030	0.78446
0.2221	2.81260	0.68434
0.2308	2.75080	0.61169
0.2403	2.69790	0.55803
0.2505	2.65480	0.51715
0.2616	2.62140	0.48444
0.2737	2.59740	0.45630
0.2871	2.58220	0.42949
0.3018	2.57480	0.40067
0.3181	2.57350	0.36568
0.3362	2.57200	0.31903
0.3566	2.53570	0.27317
0.3796	2.63420	0.17019
0.4057	2.50310	0.10303
0.4357	2.43670	0.08842
0.4705	2.39000	0.07954
0.5113	2.35300	0.07266
0.5599	2.32190	0.06690
0.6187	2.29510	0.06191
0.6913	2.27150	0.05751
0.7831	2.25050	0.05358
0.9032	2.23180	0.05004
0.9919	2.22170	0.04814

Sampled data (500 points total). Click "Download Full CSV" for complete data.

Notes

Single-crystalline hexagonal GaN (α-GaN) film on (0001) sapphire substrate. Ordinary ray (o, E⊥c). Room temperature.

References

1) T. Kawashima, H. Yoshikawa, S. Adachi. Optical properties of hexagonal GaN. J. Appl. Phys. 82, 3528-3535 (1997)
2) S. Logothetidis, J. Petalas, M. Cardona, T. D. Moustakas. Optical properties and temperature dependence of the interband transitions of cubic and hexagonal GaN. Phys. Rev. B 50, 18017-18029 (1994)
* Authors of Ref. 1 provide a simplified model of the interband transitions (MDF) based on their experimental data combined with experimental data from Ref. 2.
[Calculation script (Python)]

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