Optical constants

Refractive index of C₃H₉O₃P (Dimethyl methylphosphonate, DMMP)

Querry 1987: Infrared; n,k 2.5–56 µm

Data: tabulated nk
Range: 2.5–55.56 µm
Points: 383
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 1.41263
Extinction coefficient k: 0.0242755

Permittivity ε₁: 1.99493
Permittivity ε₂: 0.0685847

Absorption coefficient α: 258.521 cm⁻¹
Penetration depth δ = λ/(2πk): 77363.1 nm

Abbe number V_d: —
Chromatic dispersion dn/dλ: -0.435403 µm⁻¹

Group index n_g: 6.55039
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

# C3H9O3P (Dimethyl methylphosphonate, DMMP): Querry 1987: Infrared; n,k 2.5–56 µm
c3h9o3p = ls.fetch_refractiveindex("organic", "dimethyl_methylphosphonate", "Querry-IR", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c3h9o3p.range_nm)  # (2500, 55555.6) nm
eps = c3h9o3p.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_57d0ffcddacd/lightsmith"
c3h9o3p = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(c3h9o3p.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (dimethyl-methylphosphonate/querry-1987-ir).

# ... load c3h9o3p as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=c3h9o3p)],
    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.

References

M. R. Querry. Optical constants of minerals and other materials from the millimeter to the ultraviolet. Contractor Report CRDEC-CR-88009 (1987)

Cite

M. R. Querry. Optical constants of minerals and other materials from the millimeter to the ultraviolet. Contractor Report CRDEC-CR-88009 (1987); 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

C3H9O3P (Dimethyl methylphosphonate, DMMP), Querry 1987: Infrared; n,k 2.5–56 µm: n and k versus wavelength
λ (µm)	n	k
2.5	1.388	0.0
2.5063	1.389	0.0
2.5126	1.39	0.001
2.5189	1.391	0.0
2.5253	1.39	0.0
2.5316	1.391	0.0
2.5381	1.391	0.0
2.5445	1.391	0.0
2.551	1.39	0.0
2.5575	1.391	0.0
2.5641	1.391	0.0
2.5707	1.39	0.0
2.5773	1.387	0.0
2.584	1.388	0.001
2.5907	1.39	0.001
2.5974	1.391	0.0
2.6042	1.389	0.0
2.611	1.388	0.001
2.6178	1.389	0.002
2.6247	1.39	0.002
2.6316	1.391	0.001
2.6385	1.391	0.001
2.6455	1.393	0.0
2.6525	1.391	0.0
2.6596	1.39	0.0
2.6667	1.388	0.0
2.6738	1.39	0.0
2.681	1.39	0.0
2.6882	1.39	0.0
2.6954	1.388	0.0
2.7027	1.389	0.0
2.71	1.391	0.0
2.7174	1.39	0.0
2.7248	1.386	0.0
2.7322	1.388	0.0
2.7397	1.388	0.001
2.7473	1.39	0.0
2.7548	1.39	0.0
2.7624	1.39	0.0
2.7701	1.388	0.0
2.7778	1.387	0.0
2.7855	1.386	0.0
2.7933	1.386	0.0
2.8011	1.388	0.0
2.809	1.388	0.0
2.8169	1.388	0.0
2.8249	1.387	0.0
2.8329	1.387	0.0
2.8409	1.388	0.0
2.849	1.387	0.0
2.8571	1.387	0.0
2.8653	1.388	0.0
2.8736	1.39	0.0
2.8818	1.387	0.0
2.8902	1.387	0.0
2.8986	1.385	0.0
2.907	1.384	0.0
2.9155	1.384	0.0
2.924	1.388	0.001
2.9326	1.389	0.0
2.9412	1.386	0.0
2.9499	1.385	0.0
2.9586	1.384	0.0
2.9674	1.384	0.0
2.9762	1.383	0.0
2.9851	1.385	0.0
2.994	1.385	0.0
3.003	1.385	0.0
3.012	1.383	0.0
3.0211	1.381	0.0
3.0303	1.382	0.001
3.0395	1.385	0.001
3.0488	1.384	0.0
3.0581	1.384	0.0
3.0675	1.383	0.0
3.0769	1.384	0.0
3.0864	1.383	0.0
3.096	1.382	0.0
3.1056	1.383	0.0
3.1153	1.384	0.0
3.125	1.382	0.0
3.1348	1.38	0.0
3.1447	1.379	0.0
3.1546	1.381	0.001
3.1646	1.382	0.0
3.1746	1.383	0.0
3.1847	1.38	0.0
3.1949	1.378	0.0
3.2051	1.378	0.001
3.2154	1.379	0.001
3.2258	1.379	0.001
3.2362	1.379	0.0
3.2468	1.377	0.0
3.2573	1.377	0.0
3.268	1.375	0.0
3.2787	1.374	0.001
3.2895	1.371	0.002
3.3003	1.369	0.004
3.3113	1.367	0.007
3.3223	1.367	0.013
3.3333	1.37	0.018
3.3445	1.376	0.018
3.3557	1.377	0.015
3.367	1.373	0.018
3.3784	1.376	0.026
3.3898	1.387	0.029
3.4014	1.394	0.023
3.413	1.395	0.015
3.4247	1.393	0.013
3.4364	1.394	0.012
3.4483	1.394	0.008
3.4602	1.391	0.006
3.4722	1.389	0.005
3.4843	1.383	0.008
3.4965	1.386	0.014
3.5088	1.392	0.016
3.5211	1.4	0.011
3.5336	1.398	0.003
3.5461	1.393	0.001
3.5587	1.392	0.002
3.5714	1.392	0.002
3.5842	1.391	0.0
3.5971	1.388	0.0
3.6101	1.387	0.002
3.6232	1.388	0.004
3.6364	1.39	0.003
3.6496	1.391	0.002
3.663	1.389	0.0
3.6765	1.389	0.0
3.69	1.389	0.0
3.7037	1.387	0.0
3.7175	1.384	0.0
3.7313	1.384	0.001
3.7453	1.385	0.001
3.7594	1.385	0.001
3.7736	1.387	0.0
3.7879	1.385	0.0
3.8023	1.384	0.0
3.8168	1.382	0.001
3.8314	1.384	0.003
3.8462	1.386	0.001
3.861	1.385	0.0
3.876	1.383	0.0
3.8911	1.385	0.0
3.9063	1.385	0.0
3.9216	1.382	0.0
3.937	1.381	0.0
3.9526	1.381	0.0
3.9683	1.382	0.0
3.9841	1.382	0.0
4.0	1.382	0.0
4.0161	1.381	0.0
4.0323	1.38	0.0
4.0486	1.381	0.0
4.065	1.382	0.0
4.0816	1.381	0.0
4.0984	1.379	0.0
4.1152	1.379	0.001
4.1322	1.38	0.001
4.1494	1.381	0.0
4.1667	1.381	0.0
4.1841	1.38	0.0
4.2017	1.378	0.0
4.2194	1.379	0.0
4.2373	1.38	0.0
4.2553	1.376	0.0
4.2735	1.377	0.0
4.2918	1.376	0.0
4.3103	1.377	0.0
4.329	1.377	0.0
4.3478	1.378	0.0
4.3668	1.377	0.0
4.386	1.377	0.0
4.4053	1.375	0.0
4.4248	1.376	0.001
4.4444	1.377	0.0
4.4643	1.376	0.0
4.4843	1.375	0.0
4.5045	1.374	0.0
4.5249	1.374	0.0
4.5455	1.373	0.0
4.5662	1.373	0.0
4.5872	1.372	0.0
4.6083	1.373	0.001
4.6296	1.374	0.0
4.6512	1.372	0.0
4.6729	1.372	0.0
4.6948	1.371	0.0
4.717	1.371	0.0
4.7393	1.371	0.0
4.7619	1.371	0.0
4.7847	1.369	0.0
4.8077	1.368	0.001
4.8309	1.369	0.001
4.8544	1.367	0.002
4.878	1.368	0.002
4.902	1.368	0.002
4.926	1.367	0.002
4.9505	1.367	0.004
4.9751	1.368	0.006
5.0	1.37	0.005
5.0251	1.37	0.003
5.0505	1.368	0.003
5.0761	1.369	0.004
5.102	1.37	0.003
5.1282	1.369	0.001
5.1546	1.368	0.001
5.1813	1.367	0.002
5.2083	1.368	0.001
5.2356	1.367	0.0
5.2632	1.364	0.0
5.291	1.363	0.0
5.3191	1.363	0.003
5.3476	1.363	0.003
5.3763	1.364	0.004
5.4054	1.365	0.003
5.4348	1.365	0.002
5.4645	1.364	0.002
5.4945	1.363	0.002
5.5249	1.364	0.001
5.5556	1.363	0.0
5.5866	1.362	0.0
5.618	1.36	0.0
5.6497	1.357	0.0
5.6818	1.356	0.0
5.7143	1.357	0.002
5.7471	1.357	0.001
5.7803	1.356	0.001
5.814	1.356	0.0
5.848	1.356	0.0
5.8824	1.355	0.0
5.9172	1.352	0.0
5.9524	1.35	0.0
5.988	1.347	0.0
6.0241	1.347	0.0
6.0606	1.346	0.001
6.0976	1.346	0.001
6.135	1.345	0.001
6.1728	1.344	0.001
6.2112	1.343	0.001
6.25	1.342	0.0
6.2893	1.338	0.0
6.3291	1.336	0.001
6.3694	1.336	0.003
6.4103	1.335	0.002
6.4516	1.333	0.001
6.4935	1.329	0.0
6.5359	1.325	0.002
6.5789	1.323	0.003
6.6225	1.318	0.005
6.6667	1.313	0.008
6.7114	1.308	0.013
6.7568	1.306	0.023
6.8027	1.312	0.033
6.8493	1.323	0.036
6.8966	1.331	0.028
6.9444	1.332	0.019
6.993	1.323	0.017
7.0423	1.321	0.026
7.0922	1.326	0.008
7.1429	1.311	0.0
7.1942	1.305	0.008
7.2464	1.297	0.003
7.2993	1.287	0.001
7.3529	1.275	0.01
7.4074	1.26	0.0
7.4627	1.238	0.005
7.5188	1.204	0.019
7.5758	1.191	0.097
7.6336	1.306	0.131
7.6923	1.28	0.028
7.7519	1.224	0.025
7.8125	1.15	0.032
7.874	1.036	0.13
7.9365	1.116	0.38
8.0	1.301	0.444
8.0645	1.588	0.361
8.1301	1.558	0.104
8.1967	1.455	0.043
8.2645	1.393	0.04
8.3333	1.352	0.045
8.4034	1.336	0.095
8.4746	1.384	0.095
8.547	1.385	0.05
8.6207	1.36	0.035
8.6957	1.332	0.018
8.7719	1.301	0.024
8.8496	1.28	0.019
8.9286	1.251	0.02
9.009	1.215	0.031
9.0909	1.174	0.035
9.1743	1.103	0.061
9.2593	1.007	0.119
9.3458	0.914	0.357
9.434	1.135	0.573
9.5238	1.252	0.493
9.6154	1.247	0.673
9.7087	1.656	0.813
9.8039	1.948	0.421
9.901	1.82	0.144
10.0	1.695	0.066
10.101	1.618	0.042
10.2041	1.56	0.03
10.3093	1.52	0.023
10.4167	1.484	0.021
10.5263	1.434	0.022
10.6383	1.386	0.031
10.7527	1.306	0.082
10.8696	1.304	0.265
10.989	1.515	0.317
11.1111	1.569	0.21
11.236	1.624	0.13
11.3636	1.563	0.044
11.4943	1.518	0.024
11.6279	1.47	0.024
11.7647	1.428	0.021
11.9048	1.367	0.034
12.0482	1.247	0.122
12.1951	1.404	0.435
12.3457	1.647	0.161
12.5	1.481	0.098
12.6582	1.476	0.294
12.8205	1.712	0.134
12.987	1.623	0.037
13.1579	1.576	0.016
13.3333	1.545	0.015
13.5135	1.524	0.012
13.6986	1.495	0.012
13.8889	1.459	0.039
14.0845	1.55	0.105
14.2857	1.541	0.03
14.4928	1.523	0.014
14.7059	1.509	0.012
14.9254	1.505	0.009
15.1515	1.49	0.005
15.3846	1.486	0.005
15.625	1.478	0.007
15.873	1.478	0.006
16.129	1.478	0.006
16.3934	1.463	0.004
16.6667	1.463	0.004
16.9492	1.453	0.0
17.2414	1.446	0.0
17.5439	1.438	0.0
17.8571	1.433	0.0
18.1818	1.419	0.002
18.5185	1.41	0.003
18.8679	1.381	0.007
19.2308	1.349	0.012
19.6078	1.288	0.105
20.0	1.455	0.269
20.4082	1.515	0.074
20.8333	1.458	0.061
21.2766	1.461	0.099
21.7391	1.495	0.075
22.2222	1.484	0.053
22.7273	1.472	0.034
23.2556	1.437	0.035
23.8095	1.393	0.109
24.3902	1.52	0.126
25.0	1.527	0.111
25.641	1.55	0.049
26.3158	1.524	0.016
27.027	1.502	0.006
27.7778	1.483	0.002
28.5714	1.47	0.004
29.4118	1.456	0.007
30.303	1.437	0.017
31.25	1.424	0.044
32.2581	1.455	0.086
33.3333	1.503	0.062
34.4828	1.496	0.028
35.7143	1.48	0.016
37.037	1.46	0.014
38.4615	1.447	0.019
40.0	1.434	0.033
41.6667	1.43	0.047
43.4783	1.437	0.075
45.4545	1.457	0.094
47.619	1.471	0.102
50.0	1.508	0.095
52.6316	1.53	0.045
55.5556	1.504	0.044

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: —

C₃H₉O₃P (Dimethyl methylphosphonate, DMMP): all datasets

About C3H9O3P (Dimethyl methylphosphonate, DMMP)

Dimethyl methylphosphonate (C₃H₉O₃P) is an organic compound that is commonly used as a flame retardant and as a plasticizer. It is a clear, colorless liquid at room temperature and is soluble in many organic solvents. This compound is characterized by the presence of phosphorus in its molecular structure. In addition to its industrial uses, dimethyl methylphosphonate is often employed as a simulant in studies related to the detection and decontamination of nerve agent threats due to its structural similarities with certain nerve agents.

More about C3H9O3P (Dimethyl methylphosphonate, DMMP) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/organic/C3H9O3P - dimethyl methylphosphonate/nk/Querry-IR.yml
ID: ds_57d0ffcddacd
API: /v1/datasets/ds_57d0ffcddacd

Plot