Constants

Physical Constants

tidy3d.constants.C_0	Speed of light in vacuum [um/s]
tidy3d.constants.HBAR	Reduced Planck constant [eV*s]
tidy3d.constants.Q_e	Fundamental charge [C]
tidy3d.constants.ETA_0	Vacuum impedance in Ohms
tidy3d.constants.EPSILON_0	Vacuum permittivity [F/um]
tidy3d.constants.MU_0	Vacuum permeability [H/um]
tidy3d.constants.K_B	Boltzmann constant [eV/K]

Tidy3D Special Constants

tidy3d.constants.inf

Representation of infinity used within tidy3d.

Tidy3D Configuration

tidy3d.config.Tidy3dConfig

configuration of tidy3d

Default Absorber Parameters

tidy3d.DefaultPMLParameters	Specifies full set of parameters needed for complex, frequency-shifted PML.
tidy3d.DefaultStablePMLParameters	Specifies full set of parameters needed for complex, frequency-shifted PML.
tidy3d.DefaultAbsorberParameters	Specifies parameters common to Absorbers and PMLs.

Units

tidy3d.constants.HERTZ	One cycle per second.
tidy3d.constants.TERAHERTZ	One trillion (10^12) cycles per second.
tidy3d.constants.SECOND	SI unit of time.
tidy3d.constants.PICOSECOND	One trillionth (10^-12) of a second.
tidy3d.constants.METER	SI unit of length.
tidy3d.constants.MICROMETER	One millionth (10^-6) of a meter.
tidy3d.constants.NANOMETER	One billionth (10^-9) of a meter.
tidy3d.constants.RADIAN	SI unit of angle.
tidy3d.constants.CONDUCTIVITY	Siemens per micrometer.
tidy3d.constants.PERMITTIVITY	Relative permittivity.
tidy3d.constants.PML_SIGMA	2 times vacuum permittivity over time differential step.
tidy3d.constants.RADPERSEC	One radian per second.
tidy3d.constants.ELECTRON_VOLT	Unit of energy.
tidy3d.constants.KELVIN	SI unit of temperature.
tidy3d.constants.PML_SIGMA	2 times vacuum permittivity over time differential step.
tidy3d.constants.CMCUBE	Cubic centimeter unit of volume.
tidy3d.constants.PERCMCUBE	Unit per centimeter cube.
tidy3d.constants.WATT	SI unit of power.
tidy3d.constants.VOLT	SI unit of electric potential.
tidy3d.constants.THERMAL_CONDUCTIVITY	Watts per (micrometer Kelvin).
tidy3d.constants.SPECIFIC_HEAT_CAPACITY	Joules per (kilogram Kelvin).
tidy3d.constants.HEAT_FLUX	Watts per square micrometer.
tidy3d.constants.VOLUMETRIC_HEAT_RATE	Watts per cube micrometer.
tidy3d.constants.HEAT_TRANSFER_COEFF	Watts per (square micrometer Kelvin).

Precision & Comparator Values

tidy3d.constants.dp_eps	Double floating point precision.
tidy3d.constants.fp_eps	Floating point precision.
tidy3d.constants.pec_val	PEC values for mode solver
tidy3d.constants.LARGE_NUMBER	Large number used for comparing infinity.
tidy3d.constants.GLANCING_CUTOFF	if |np.pi/2 - angle_theta| < GLANCING_CUTOFF in an angled source or in mode spec, raise warning.