Constants

Physical Constants

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

Tidy3D Special Constants

constants.inf

Representation of infinity used within tidy3d.

Tidy3D Configuration

config.ConfigManager

High-level orchestrator for tidy3d configuration.

Default Absorber Parameters

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

Units

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

Precision & Comparator Values

constants.dp_eps	Double floating point precision.
constants.fp_eps	Floating point precision.
constants.pec_val	PEC values for mode solver
constants.LARGE_NUMBER	Large number used for comparing infinity.
constants.GLANCING_CUTOFF	If angle_theta is within GLANCING_CUTOFF of an odd multiple of np.pi/2 in an angled source or in mode spec, raise warning.