Cs (Caesium)

4 datasets, together covering 0.1294–2.422 µm. Default: Smith 1970: n,k 0.313–2.42 µm.

Compare datasets

Tick datasets in the list to add them to the plot (up to 12).

Datasets

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# Cs (Caesium): Smith 1970: n,k 0.313–2.42 µm
cs = ls.fetch_refractiveindex("main", "Cs", "Smith", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cs.range_nm)  # (312.539, 2421.57) nm
eps = cs.eps([633])  # 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_1d76d964520a/lightsmith"
cs = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(cs.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (cs/smith-1970).

# ... load cs as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=cs)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=400, 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.

About Cs (Caesium)

Caesium (Cs) is an alkali metal characterised by its softness and extremely low melting point for a metal, just above room temperature at 28.5 °C (83.3 °F). It is silvery-gold in colour and highly reactive, especially with water, leading to its storage in mineral oil or inert gases. In the realm of technology, caesium is crucial for the operation of atomic clocks, which use the microwave spectral line emitted by electrons in caesium atoms to define the second, the base unit of time. Due to the high precision of caesium-based atomic clocks, they serve as the timekeeping standard for global navigation satellite systems like GPS. Caesium is also used in photoelectric cells, ion propulsion systems, and as a catalyst in certain organic reactions. Despite its technological utility, caesium compounds must be handled with care as they can be corrosive and pose health risks upon exposure. Overall, caesium is a fascinating element whose unique properties make it indispensable in precision timekeeping and various specialised applications.

Other names: Caesium, Cesium (American spelling)

API: /v1/materials/mat_c157d05ac74a · slug cs