At one wavelength

Refractive index n: 1.5826
Extinction coefficient k: 0

Permittivity ε₁: 2.50464
Permittivity ε₂: 0

Absorption coefficient α: 0 cm⁻¹
Penetration depth δ = λ/(2πk): — nm

Abbe number V_d: —
Chromatic dispersion dn/dλ: -0.0806452 µm⁻¹

Group index n_g: 1.62999
Group velocity dispersion: — fs²/mm

Dispersion parameter D: — ps/(nm·km)
Photon energy: 2.11001 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.

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# DNA: Inagaki et al. 1974: n,k 0.015–0.62 µm
dna = ls.fetch_refractiveindex("other", "DNA", "Inagaki", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(dna.range_nm)  # (15.1, 619.9) nm
eps = dna.eps([96.7])  # complex permittivity

Downloads the original record once (pinned to the imported snapshot) and caches it.

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_02c6a1e5a112/lightsmith"
dna = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(dna.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (dna/inagaki-1974).

# ... load dna as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=dna)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=400, stop_nm=619, num=81),
)
res = ls.solve(sim)  # exact Mie for a sphere
print(res.q_ext)     # extinction efficiency at each wavelength

Same spec runs with DDA, FDTD, BEM or T-matrix: ls.compare(sim, ["mie", "dda"]).

Materials guide Open a sphere of it in Studio Quick start Ask the community

Lightsmith is open source (MIT): Mie, T-matrix, BEM, DDA, FDTD, RCWA, TMM, mode solvers and inverse design behind one spec, on CPU or GPU. GitHub.

Comments and conditions

Dry films of deoxyribonucleic acid (sodium salt of calf thymus DNA)

References

T. Inagaki, R. N. Hamm, E. T. Arakawa. Optical and dielectric properties of DNA in the extreme ultraviolet. J. Chem. Phys., 61, 4246-4250 (1974)

doi:10.1063/1.1681724 Optical and dielectric properties of DNA in the extreme ultraviolet, The Journal of Chemical Physics (1974)

Cite

T. Inagaki, R. N. Hamm, E. T. Arakawa and L. R. Painter. Optical and dielectric properties of DNA in the extreme ultraviolet. The Journal of Chemical Physics, 61, 4246-4250 (1974), doi:10.1063/1.1681724; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

68 rows as published

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

DNA, Inagaki et al. 1974: n,k 0.015–0.62 µm: n and k versus wavelength
λ (µm)	n	k
0.0151	0.96	0.01
0.0165	0.96	0.014
0.0177	0.95	0.018
0.0191	0.95	0.028
0.0207	0.94	0.029
0.0225	0.93	0.038
0.0248	0.92	0.049
0.0276	0.9	0.065
0.031	0.89	0.087
0.0354	0.87	0.12
0.0413	0.84	0.18
0.0443	0.84	0.22
0.0477	0.83	0.26
0.0517	0.83	0.32
0.0564	0.84	0.38
0.062	0.87	0.46
0.0653	0.88	0.52
0.0689	0.91	0.58
0.0708	0.94	0.61
0.0729	0.97	0.64
0.0751	1.0	0.67
0.0775	1.04	0.7
0.08	1.09	0.73
0.0827	1.14	0.75
0.0855	1.2	0.76
0.0886	1.26	0.77
0.0918	1.33	0.76
0.0954	1.4	0.75
0.0992	1.46	0.73
0.1033	1.53	0.69
0.1078	1.59	0.64
0.1127	1.63	0.59
0.1181	1.66	0.53
0.124	1.67	0.48
0.1265	1.68	0.45
0.1292	1.68	0.43
0.1319	1.69	0.41
0.1348	1.69	0.39
0.1378	1.69	0.37
0.1409	1.69	0.35
0.1442	1.69	0.33
0.1476	1.69	0.31
0.1512	1.68	0.29
0.155	1.68	0.28
0.159	1.67	0.26
0.1631	1.66	0.25
0.1675	1.64	0.24
0.1722	1.63	0.23
0.1771	1.62	0.24
0.1823	1.6	0.25
0.1879	1.62	0.27
0.1937	1.65	0.27
0.2	1.68	0.26
0.2066	1.7	0.24
0.2138	1.72	0.2
0.2214	1.72	0.14
0.2296	1.67	0.1
0.2384	1.62	0.12
0.248	1.6	0.17
0.2583	1.64	0.22
0.2695	1.72	0.21
0.2818	1.78	0.15
0.2952	1.77	0.052
0.31	1.71	0.0
0.3542	1.64	0.0
0.4133	1.61	0.0
0.4959	1.59	0.0
0.6199	1.58	0.0

Optical transmission calculator

Free-standing sample in vacuum, normal incidence

Transmittance T: —
Reflectance R: —

Fresnel reflection calculator

R_p: —
R_s: —
R = (R_p+R_s)/2: —
Phase φ_p: —
Phase φ_s: —
Brewster angle θ_B: —
Critical angle θ_C: —

Plot