plask.phys

Basic physical constants and utility functions.

Constants

qe	Elementary charge (C)
me	Electron mass (kg)
c	Speed of light (m/s)
mu0	Vacuum permeability (V·s/(A·m))
eps0	Vacuum permittivity (pF/µm)
eta0	Free space impedance (Ω)
Z0	Free space impedance (Ω)
h.J	Planck constant (J·s)
h.eV	Planck constant (eV·s)
SB	Stefan-Boltzmann constant (W/(m2·K4))
kB.J	Boltzmann constant (J/K)
kB.eV	Boltzmann constant (eV/K)

Functions

eV2nm(eV)	Compute wavelength for specified photon energy.
nm2eV(nm)	Compute photon energy for specified wavelength.
wl(mat, lam[, T])	Compute real length of optical wavelength in specified material.

Descriptions

Function Details

plask.phys.eV2nm(eV)

Compute wavelength for specified photon energy.

Parameters:

eV (float) – Photon energy (eV).

Returns:

Wavelength (nm).

Return type:

float

plask.phys.nm2eV(nm)

Compute photon energy for specified wavelength.

Parameters:

nm (float) – Wavelength (eV).

Returns:

Photon energy (nm).

Return type:

float

plask.phys.wl(mat, lam, T=300.0)

Compute real length of optical wavelength in specified material.

This is utility function that computes the physical length of a single wavelength in specified material. Its main purpose is easier design of DBR stacks.

If you are using it with custom materials, make sure that it does provide nr() method.

Parameters:

• mat (material.Material or str) – Material to compute physical wavelength in.

• lam (float) – Free-space wavelength to scale for material mat (nm).

• T (float) – Temperature at which material refractive index is retrieved.

Returns:

Real length of the one wavelength in the material (µm).

Return type:

float