Optical constants

Refractive index of Kapton

Brannon et al. 1985: k 0.19–0.39 µm

Data: tabulated k
Range: 0.19–0.39 µm
Points: 21
Licence: CC0-1.0

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At one wavelength

Refractive index n: —
Extinction coefficient k: 0.397982

Permittivity ε₁: —
Permittivity ε₂: —

Absorption coefficient α: 183867 cm⁻¹
Penetration depth δ = λ/(2πk): 108.774 nm

Abbe number V_d: —
Chromatic dispersion dn/dλ: — µm⁻¹

Group index n_g: —
Group velocity dispersion: — fs²/mm

Dispersion parameter D: — ps/(nm·km)
Photon energy: 4.55824 eV

ε = (n + ik)², α = 4πk/λ, n_g = n − λ dn/dλ, GVD = λ³/(2πc²) d²n/dλ², D = −(λ/c) d²n/dλ². Group-velocity dispersion is given for formula data only.

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Comments and conditions

Polyimide thin films which are chemically identical to Kapton thin films.

Notes on the source data (kept exactly as published):

the source gives k only; n is not available

References

J. H. Brannon, J. R. Lankard, A. I. Baise, F. Burns, J. Kaufman. Excimer laser etching of polyimide. J. Appl. Phys. 58, 2036-2043 (1985)

doi:10.1063/1.336012 Excimer laser etching of polyimide, Journal of Applied Physics (1985)

Cite

J. H. Brannon, J. R. Lankard, A. I. Baise, F. Burns and J. Kaufman. Excimer laser etching of polyimide. Journal of Applied Physics, 58, 2036-2043 (1985), doi:10.1063/1.336012; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

21 rows as published

CSV comma separated TXT tab separated YAML n, k Full database record original YAML All quantities CSV JSON metadata

Kapton, Brannon et al. 1985: k 0.19–0.39 µm: n and k versus wavelength
λ (µm)	k
0.19	0.634052
0.2	0.613258
0.21	0.621597
0.22	0.715315
0.23	0.699655
0.24	0.610934
0.25	0.474069
0.26	0.376666
0.27	0.389769
0.28	0.430836
0.29	0.422135
0.3	0.365377
0.31	0.230776
0.32	0.165424
0.33	0.134675
0.34	0.110226
0.35	0.0808255
0.36	0.0758986
0.37	0.0681804
0.38	0.054555
0.39	0.0491683

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Comments and conditions

References

Data