Optical constants

Refractive index of Cu₂O (Copper(I) oxide)

Querry 1985: n,k 2.5–55.6 µm

Data: tabulated nk
Range: 2.5–55.56 µm
Points: 381
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 2.21649
Extinction coefficient k: 0.029252

Permittivity ε₁: 4.91196
Permittivity ε₂: 0.129673

Absorption coefficient α: 311.518 cm⁻¹
Penetration depth δ = λ/(2πk): 64201.8 nm

Abbe number V_d: —
Chromatic dispersion dn/dλ: -0.0428266 µm⁻¹

Group index n_g: 2.72184
Group velocity dispersion: — fs²/mm

Dispersion parameter D: — ps/(nm·km)
Photon energy: 0.105071 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

# Cu2O (Copper(I) oxide): Querry 1985: n,k 2.5–55.6 µm
cu2o = ls.fetch_refractiveindex("main", "Cu2O", "Querry", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cu2o.range_nm)  # (2500, 55555.6) nm
eps = cu2o.eps([11800])  # 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_eb49a5b22e3f/lightsmith"
cu2o = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(cu2o.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (cu2o/querry-1985).

# ... load cu2o as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=cu2o)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=2500, stop_nm=55560, 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

Cuprous oxide pellet.

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

k < 0 at some wavelengths in the source data (gain, or a sign convention issue)

References

M. R. Querry. Optical constants, Contractor Report CRDC-CR-85034 (1985)

Cite

M. R. Querry. Optical constants, Contractor Report CRDC-CR-85034 (1985); Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

383 rows as published

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

Cu2O (Copper(I) oxide), Querry 1985: n,k 2.5–55.6 µm: n and k versus wavelength
λ (µm)	n	k
2.5	2.262	0.025
2.5063	2.267	0.026
2.5126	2.268	0.026
2.5189	2.268	0.026
2.5253	2.268	0.027
2.5316	2.268	0.027
2.5381	2.269	0.028
2.5445	2.27	0.028
2.551	2.27	0.028
2.5575	2.27	0.029
2.5641	2.27	0.029
2.5707	2.271	0.029
2.5773	2.271	0.029
2.584	2.272	0.029
2.5907	2.272	0.03
2.5974	2.272	0.03
2.6042	2.273	0.031
2.611	2.273	0.031
2.6178	2.274	0.031
2.6247	2.274	0.03
2.6316	2.274	0.031
2.6385	2.274	0.031
2.6455	2.274	0.031
2.6525	2.274	0.031
2.6596	2.274	0.032
2.6667	2.275	0.033
2.6738	2.276	0.033
2.681	2.277	0.033
2.6882	2.277	0.032
2.6954	2.277	0.032
2.7027	2.277	0.032
2.71	2.277	0.033
2.7174	2.277	0.033
2.7248	2.278	0.033
2.7322	2.278	0.032
2.7397	2.278	0.033
2.7473	2.278	0.033
2.7548	2.278	0.032
2.7624	2.278	0.033
2.7701	2.278	0.033
2.7778	2.278	0.033
2.7855	2.278	0.033
2.7933	2.278	0.033
2.8011	2.277	0.034
2.809	2.277	0.034
2.8169	2.277	0.035
2.8249	2.277	0.035
2.8329	2.277	0.036
2.8409	2.278	0.036
2.849	2.278	0.037
2.8571	2.278	0.037
2.8653	2.278	0.038
2.8736	2.279	0.038
2.8818	2.279	0.039
2.8902	2.28	0.039
2.8986	2.28	0.039
2.907	2.28	0.039
2.9155	2.28	0.04
2.924	2.281	0.04
2.9326	2.281	0.04
2.9412	2.281	0.04
2.9499	2.281	0.04
2.9586	2.281	0.041
2.9674	2.282	0.042
2.9762	2.283	0.042
2.9851	2.284	0.042
2.994	2.284	0.042
3.003	2.284	0.042
3.012	2.284	0.042
3.0211	2.285	0.043
3.0303	2.285	0.043
3.0395	2.286	0.043
3.0488	2.286	0.043
3.0581	2.286	0.043
3.0675	2.286	0.043
3.0769	2.286	0.044
3.0864	2.287	0.044
3.096	2.288	0.044
3.1056	2.288	0.044
3.1153	2.288	0.045
3.125	2.288	0.045
3.1348	2.289	0.045
3.1447	2.289	0.045
3.1546	2.29	0.045
3.1646	2.29	0.045
3.1746	2.291	0.046
3.1847	2.292	0.045
3.1949	2.292	0.045
3.2051	2.292	0.045
3.2154	2.292	0.045
3.2258	2.292	0.045
3.2362	2.293	0.045
3.268	2.294	0.046
3.268	2.293	0.046
3.2787	2.295	0.046
3.2895	2.295	0.046
3.3003	2.296	0.046
3.3113	2.296	0.046
3.3223	2.297	0.045
3.3223	2.293	0.046
3.3333	2.297	0.045
3.3445	2.297	0.045
3.3557	2.297	0.045
3.367	2.297	0.044
3.3784	2.297	0.045
3.3898	2.297	0.045
3.4014	2.297	0.045
3.413	2.298	0.045
3.4247	2.298	0.045
3.4364	2.298	0.045
3.4483	2.298	0.045
3.4602	2.298	0.046
3.4722	2.299	0.046
3.4843	2.299	0.046
3.4965	2.3	0.046
3.5088	2.3	0.046
3.5211	2.3	0.046
3.5336	2.301	0.046
3.5461	2.301	0.045
3.5587	2.301	0.045
3.5714	2.301	0.045
3.5842	2.302	0.045
3.5971	2.302	0.045
3.6101	2.302	0.045
3.6232	2.302	0.045
3.6364	2.302	0.045
3.6496	2.302	0.045
3.663	2.303	0.045
3.6765	2.303	0.045
3.69	2.303	0.045
3.7037	2.304	0.045
3.7175	2.304	0.045
3.7313	2.304	0.045
3.7453	2.305	0.043
3.7594	2.305	0.045
3.7736	2.305	0.044
3.7879	2.305	0.044
3.8023	2.305	0.044
3.8168	2.306	0.044
3.8314	2.306	0.044
3.8462	2.306	0.044
3.861	2.306	0.044
3.876	2.306	0.044
3.8911	2.306	0.043
3.9063	2.306	0.043
3.9216	2.306	0.043
3.937	2.307	0.043
3.9526	2.307	0.043
3.9683	2.307	0.043
3.9841	2.307	0.043
4.0	2.307	0.043
4.0161	2.307	0.043
4.0323	2.307	0.043
4.0486	2.307	0.043
4.065	2.307	0.044
4.0816	2.308	0.044
4.0984	2.308	0.043
4.1152	2.308	0.043
4.1322	2.308	0.043
4.1494	2.308	0.043
4.1667	2.309	0.043
4.1841	2.308	0.042
4.2017	2.308	0.043
4.2194	2.308	0.043
4.2373	2.308	0.043
4.2553	2.308	0.043
4.2735	2.309	0.043
4.2918	2.309	0.043
4.3103	2.309	0.043
4.329	2.309	0.043
4.3478	2.309	0.043
4.3668	2.309	0.042
4.386	2.309	0.042
4.4053	2.309	0.043
4.4248	2.31	0.043
4.4444	2.31	0.043
4.4643	2.31	0.042
4.4843	2.31	0.042
4.5045	2.31	0.042
4.5249	2.309	0.042
4.5455	2.31	0.042
4.5662	2.31	0.042
4.5872	2.31	0.042
4.6083	2.31	0.042
4.6296	2.309	0.042
4.6512	2.31	0.043
4.6729	2.31	0.043
4.6948	2.31	0.043
4.717	2.31	0.042
4.7393	2.31	0.042
4.7619	2.31	0.043
4.7847	2.31	0.043
4.8077	2.311	0.043
4.8309	2.311	0.043
4.8544	2.311	0.043
4.878	2.31	0.042
4.902	2.31	0.043
4.9261	2.31	0.043
4.9505	2.311	0.043
4.9751	2.31	0.043
5.0	2.31	0.044
5.0251	2.311	0.045
5.0505	2.312	0.045
5.0761	2.313	0.044
5.102	2.313	0.044
5.1282	2.313	0.044
5.1546	2.313	0.044
5.1813	2.314	0.044
5.2083	2.314	0.044
5.2356	2.314	0.043
5.2632	2.314	0.043
5.291	2.314	0.044
5.3191	2.315	0.043
5.3476	2.315	0.043
5.3763	2.313	0.043
5.4054	2.315	0.042
5.4348	2.315	0.042
5.4645	2.315	0.042
5.4945	2.315	0.042
5.5249	2.315	0.042
5.5556	2.315	0.041
5.5866	2.314	0.042
5.618	2.315	0.042
5.6497	2.315	0.042
5.6818	2.315	0.042
5.7143	2.315	0.042
5.7471	2.315	0.041
5.7803	2.315	0.041
5.814	2.315	0.041
5.848	2.315	0.04
5.8824	2.314	0.04
5.9172	2.314	0.04
5.9524	2.314	0.04
5.988	2.314	0.04
6.0241	2.314	0.04
6.0606	2.314	0.04
6.0976	2.314	0.04
6.135	2.314	0.04
6.1728	2.313	0.041
6.2112	2.313	0.041
6.25	2.313	0.041
6.2893	2.314	0.041
6.3291	2.314	0.041
6.3694	2.314	0.041
6.4103	2.314	0.04
6.4516	2.314	0.04
6.4935	2.314	0.04
6.5359	2.314	0.04
6.5789	2.314	0.04
6.6225	2.314	0.04
6.6667	2.314	0.039
6.7114	2.313	0.04
6.7568	2.313	0.04
6.8027	2.314	0.039
6.8493	2.313	0.039
6.8966	2.312	0.039
6.9444	2.312	0.039
6.993	2.312	0.04
7.0423	2.312	0.039
7.0922	2.312	0.04
7.1429	2.313	0.04
7.1942	2.313	0.04
7.2464	2.313	0.039
7.2993	2.314	0.039
7.3529	2.314	0.037
7.4074	2.313	0.037
7.4627	2.313	0.036
7.5188	2.312	0.036
7.5758	2.312	0.035
7.6336	2.312	0.034
7.6923	2.311	0.034
7.7519	2.31	0.033
7.8125	2.309	0.033
7.874	2.308	0.033
7.9365	2.307	0.032
8.0	2.307	0.032
8.0645	2.306	0.032
8.1301	2.305	0.031
8.1967	2.303	0.031
8.2645	2.302	0.031
8.3333	2.301	0.031
8.4034	2.299	0.031
8.4746	2.298	0.031
8.547	2.296	0.031
8.6207	2.294	0.032
8.6957	2.293	0.034
8.7719	2.293	0.036
8.8496	2.293	0.037
8.9286	2.294	0.038
9.009	2.296	0.037
9.0909	2.296	0.035
9.1743	2.295	0.033
9.2593	2.294	0.032
9.3458	2.292	0.031
9.434	2.291	0.03
9.5238	2.289	0.029
9.6154	2.286	0.028
9.7087	2.283	0.028
9.8039	2.281	0.028
9.901	2.278	0.029
10.0	2.277	0.03
10.101	2.276	0.029
10.2041	2.273	0.027
10.3093	2.27	0.027
10.4167	2.268	0.027
10.5263	2.265	0.027
10.6383	2.261	0.026
10.7527	2.257	0.026
10.8696	2.254	0.026
10.989	2.249	0.025
11.1111	2.245	0.025
11.236	2.24	0.026
11.3636	2.235	0.026
11.4943	2.229	0.027
11.6279	2.224	0.029
11.7647	2.218	0.029
11.9048	2.212	0.03
12.0482	2.205	0.03
12.1951	2.198	0.031
12.3457	2.19	0.032
12.5	2.181	0.033
12.6582	2.172	0.033
12.8205	2.161	0.032
12.987	2.148	0.03
13.1579	2.131	0.027
13.3333	2.109	0.027
13.5135	2.083	0.028
13.6986	2.051	0.031
13.8889	2.013	0.04
14.0845	1.971	0.054
14.2857	1.925	0.073
14.4928	1.871	0.087
14.7059	1.779	0.098
14.9254	1.616	0.147
15.1515	1.392	0.333
15.3846	1.25	0.736
15.625	1.384	1.275
15.873	1.856	1.694
16.129	2.525	1.822
16.3934	3.19	1.471
16.6667	3.366	0.852
16.9492	3.209	0.489
17.2414	3.057	0.33
17.5439	2.947	0.249
17.8571	2.868	0.2
18.1818	2.803	0.171
18.5185	2.755	0.158
18.8679	2.723	0.152
19.2308	2.704	0.146
19.6078	2.692	0.138
20.0	2.681	0.125
20.4082	2.672	0.113
20.8333	2.663	0.098
21.2766	2.65	0.083
21.7391	2.635	0.073
22.2222	2.622	0.069
22.7273	2.615	0.068
23.2558	2.615	0.064
23.8095	2.616	0.054
24.3902	2.613	0.039
25.0	2.604	0.023
25.641	2.59	0.012
26.3158	2.578	0.005
27.027	2.565	-0.001
27.7778	2.553	-0.002
28.5714	2.543	-0.004
29.4118	2.535	-0.002
30.303	2.531	-0.002
31.25	2.528	-0.003
32.2581	2.523	-0.006
33.3333	2.519	-0.008
34.4828	2.513	-0.012
35.7143	2.506	-0.012
37.037	2.502	-0.013
38.4615	2.496	-0.012
40.0	2.496	-0.013
41.6667	2.49	-0.018
43.4783	2.482	-0.019
45.4545	2.481	-0.007
47.619	2.483	-0.023
50.0	2.467	-0.021
52.6316	2.462	-0.018
55.5556	2.456	-0.012

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: —

Cu₂O (Copper(I) oxide): all datasets

Querry 1985: n,k 2.5–55.6 µm n,k 2.5–55.56 µm default

About Cu2O (Copper(I) oxide)

Copper(I) oxide (Cu₂O) is a reddish compound that has applications in a variety of fields including electronics, catalysis, and optics. It forms naturally as a mineral known as cuprite, but can also be synthesized for specific applications. In the context of optics, Cu₂O has been studied for its potential use in photonic devices, owing to its direct band gap. While it isn't commonly used in mainstream optical components, its unique optical properties are being explored for potential use in specialized photonic applications, such as in the development of photodetectors or light-emitting diodes (LEDs). Overall, Copper(I) oxide's versatility extends beyond its traditional roles in metallurgy and catalysis, holding promise for specialized optical applications. Mineral: Cuprite

More about Cu2O (Copper(I) oxide) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/main/Cu2O/nk/Querry.yml
ID: ds_eb49a5b22e3f
API: /v1/datasets/ds_eb49a5b22e3f

Plot