(C₆H₁₂)_n (Polymethylpentene, PMP)

Polymers and photoresists

1 dataset, together covering 29.41–200 µm. Default: Smith and Loewenstein 1975: n,k 29.4–200 µm.

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Datasets

Smith and Loewenstein 1975: n,k 29.4–200 µm n,k 29.41–200 µm default

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# (C6H12)n (Polymethylpentene, PMP): Smith and Loewenstein 1975: n,k 29.4–200 µm
mat = ls.fetch_refractiveindex("organic", "C6H12_n - polymethylpentene", "Smith", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(mat.range_nm)  # (29411.8, 200000) nm
eps = mat.eps([76700])  # 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_52178c82d1cd/lightsmith"
mat = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(mat.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (c6h12-n-polymethylpentene/smith-loewenstein-1975).

# ... load mat as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=mat)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=29410, stop_nm=200000, 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.

About (C6H12)n (Polymethylpentene, PMP)

Polymethylpentene (PMP, (C₆H₁₂)_n) is a thermoplastic polymer known for its high transparency, low density, and remarkable resistance to chemicals, particularly acids and alkalis. Due to its excellent clarity and ability to transmit ultraviolet and infrared light, it is often used in optical applications. PMP has a low moisture absorption rate, making it ideal for use in environments where dampness or humidity is a concern. It's also resistant to high temperatures, with a melting point around 230°C. Typical applications of PMP include lab equipment, electrical components, microwave cookware, and gas-permeable packaging. In the optics field, its refractive index and transmission properties can vary depending on the processing method and additives used. Overall, PMP combines the beneficial optical properties of glass with the ease of fabrication seen in plastics.

Other names: C6H12_n - polymethylpentene, C6H12)n (Polymethylpentene, PMP, Polymethylpentene, (C₆H₁₂)_n, PMP, poly(4-methyl-1-pentene), TPX

API: /v1/materials/mat_6ea275339954 · slug c6h12-n-polymethylpentene