Optical constants

Refractive index of C₃H₉O₃P (Dimethyl methylphosphonate, DMMP)

Querry 1987: Near-infrared; n,k 0.80–2.5 µm

Data: tabulated nk
Range: 0.8045–2.499 µm
Points: 167
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 1.409
Extinction coefficient k: 7.00000e-06

Permittivity ε₁: 1.98528
Permittivity ε₂: 1.97260e-05

Absorption coefficient α: 0.619469 cm⁻¹
Penetration depth δ = λ/(2πk): 3.22857e+07 nm

Abbe number V_d: —
Chromatic dispersion dn/dλ: 0 µm⁻¹

Group index n_g: 1.409
Group velocity dispersion: — fs²/mm

Dispersion parameter D: — ps/(nm·km)
Photon energy: 0.873128 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: Near-infrared; n,k 0.80–2.5 µm
c3h9o3p = ls.fetch_refractiveindex("organic", "dimethyl_methylphosphonate", "Querry-NIR", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c3h9o3p.range_nm)  # (804.5, 2499.5) nm
eps = c3h9o3p.eps([1420])  # 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_eb541c61f0c3/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-nir).

# ... 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=805, stop_nm=1000, 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

168 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: Near-infrared; n,k 0.80–2.5 µm: n and k versus wavelength
λ (µm)	n	k
0.8045	1.412	0.0
0.8145	1.412	0.0
0.8245	1.411	0.0
0.8345	1.411	0.0
0.8445	1.411	0.0
0.8545	1.411	0.0
0.8645	1.411	0.0
0.8745	1.411	0.0
0.8845	1.411	1e-06
0.8945	1.411	1e-06
0.9045	1.411	1e-06
0.9145	1.411	0.0
0.9245	1.411	0.0
0.9345	1.411	0.0
0.9445	1.411	0.0
0.9545	1.411	0.0
0.9645	1.411	0.0
0.9745	1.411	0.0
0.9845	1.411	0.0
0.9945	1.411	1e-06
1.0045	1.411	1e-06
1.0145	1.411	1e-06
1.0245	1.411	1e-06
1.0345	1.41	1e-06
1.0445	1.41	1e-06
1.0545	1.41	0.0
1.0645	1.41	1e-06
1.0745	1.41	0.0
1.0845	1.41	1e-06
1.0945	1.41	1e-06
1.1045	1.41	1e-06
1.1145	1.41	1e-06
1.1245	1.41	2e-06
1.1345	1.41	4e-06
1.1445	1.41	5e-06
1.1545	1.41	6e-06
1.1645	1.41	9e-06
1.1745	1.41	1e-05
1.1845	1.41	6e-06
1.1945	1.41	3e-06
1.2045	1.41	2e-06
1.2145	1.41	1e-06
1.2245	1.41	1e-06
1.2345	1.41	1e-06
1.2445	1.41	1e-06
1.2545	1.41	1e-06
1.2645	1.41	1e-06
1.2745	1.409	1e-06
1.2845	1.409	1e-06
1.2945	1.409	1e-06
1.3045	1.409	1e-06
1.3145	1.409	1e-06
1.3245	1.409	2e-06
1.3345	1.409	4e-06
1.3445	1.409	8e-06
1.3545	1.409	1.1e-05
1.3645	1.409	1.2e-05
1.3745	1.409	1.1e-05
1.3845	1.409	1.6e-05
1.3945	1.409	1.2e-05
1.4045	1.409	7e-06
1.4145	1.409	7e-06
1.4245	1.409	7e-06
1.4345	1.409	8e-06
1.4445	1.409	7e-06
1.4545	1.409	5e-06
1.4645	1.409	4e-06
1.4745	1.409	3e-06
1.4845	1.409	4e-06
1.4945	1.409	4e-06
1.5045	1.408	3e-06
1.5145	1.408	3e-06
1.5245	1.408	2e-06
1.5345	1.408	2e-06
1.5445	1.408	2e-06
1.5545	1.408	2e-06
1.5645	1.408	2e-06
1.5745	1.408	3e-06
1.6095	1.408	6e-06
1.6195	1.408	8e-06
1.6295	1.408	1.1e-05
1.6395	1.408	1.5e-05
1.6495	1.408	2.1e-05
1.6595	1.408	4.2e-05
1.6695	1.408	7.9e-05
1.6795	1.408	9.4e-05
1.6895	1.408	7.2e-05
1.6995	1.408	5.6e-05
1.7095	1.408	7.2e-05
1.7295	1.408	9.2e-05
1.7295	1.408	9.3e-05
1.7395	1.408	4.7e-05
1.7495	1.408	4.1e-05
1.7595	1.407	2.5e-05
1.7695	1.407	2.6e-05
1.7795	1.407	2.9e-05
1.7895	1.407	2.6e-05
1.7995	1.407	2.3e-05
1.8095	1.407	2.1e-05
1.8195	1.407	1.8e-05
1.8295	1.407	1.6e-05
1.8395	1.407	1.6e-05
1.8495	1.407	1.6e-05
1.8595	1.407	1.8e-05
1.8695	1.407	1.8e-05
1.8795	1.407	1.8e-05
1.8895	1.407	1.9e-05
1.8995	1.407	1.6e-05
1.9095	1.407	1.6e-05
1.9195	1.407	1.9e-05
1.9295	1.407	1.7e-05
1.9395	1.407	1.5e-05
1.9495	1.406	1.5e-05
1.9595	1.406	1.4e-05
1.9695	1.406	1.3e-05
1.9795	1.406	1.2e-05
1.9895	1.406	1.2e-05
1.9995	1.406	1.2e-05
2.0095	1.406	1.2e-05
2.0195	1.406	1.3e-05
2.0295	1.406	1.4e-05
2.0395	1.406	1.5e-05
2.0495	1.406	1.6e-05
2.0595	1.406	1.7e-05
2.0695	1.406	2.1e-05
2.0795	1.406	2.6e-05
2.0895	1.406	2.9e-05
2.0995	1.406	3e-05
2.1095	1.405	3.3e-05
2.1195	1.405	3.9e-05
2.1295	1.405	4.6e-05
2.1395	1.405	4.9e-05
2.1495	1.405	5.5e-05
2.1595	1.405	6.9e-05
2.1695	1.405	8.2e-05
2.1795	1.405	9.7e-05
2.1895	1.405	0.000121
2.1995	1.405	0.000162
2.2095	1.405	0.000231
2.2195	1.404	0.000352
2.2295	1.404	0.000578
2.2395	1.404	0.000906
2.2495	1.405	0.001215
2.2595	1.405	0.001168
2.2695	1.405	0.00134
2.2795	1.405	0.000595
2.2895	1.405	0.000371
2.2995	1.405	0.000307
2.3095	1.405	0.000315
2.3195	1.405	0.000474
2.3295	1.405	0.000426
2.3395	1.404	0.00033
2.3495	1.404	0.00035
2.3595	1.404	0.000349
2.3695	1.404	0.000378
2.3795	1.404	0.000558
2.3895	1.404	0.000637
2.3995	1.404	0.000538
2.4095	1.404	0.000422
2.4195	1.404	0.000356
2.4295	1.404	0.000365
2.4395	1.404	0.000421
2.4495	1.404	0.000529
2.4595	1.404	0.000667
2.4695	1.404	0.000687
2.4795	1.404	0.000632
2.4895	1.404	0.000574
2.4995	1.404	0.000535

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-NIR.yml
ID: ds_eb541c61f0c3
API: /v1/datasets/ds_eb541c61f0c3

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