tidy3d.FossumCarrierLifetime

class FossumCarrierLifetime

Bases: Tidy3dBaseModel

Parameters for the Fossum carrier lifetime model

Parameters:

• attrs (dict = {}) – Dictionary storing arbitrary metadata for a Tidy3D object. This dictionary can be freely used by the user for storing data without affecting the operation of Tidy3D as it is not used internally. Note that, unlike regular Tidy3D fields, attrs are mutable. For example, the following is allowed for setting an attr obj.attrs['foo'] = bar. Also note that Tidy3D will raise a TypeError if attrs contain objects that can not be serialized. One can check if attrs are serializable by calling obj.json().

• tau_300 (PositiveFloat) – [units = sec]. Carrier lifetime at 300K

• alpha_T (float) – Exponent for thermal dependence

• N0 (PositiveFloat) – [units = 1/cm^3]. Reference concentration

• A (float) – Constant A

• B (float) – Constant B

• C (float) – Constant C

• alpha (float) – Exponent constant

Notes

This model expresses the carrier lifetime as a function of the temperature and doping concentration.

\[\tau = \frac{\tau_{300} \left( T/300 \right)^\alpha_T}{A + B (N/N_0) + C (N/N_0)^\alpha}\]

Example

>>> import tidy3d as td
>>> default_Si = td.FossumCarrierLifetime(
...   tau_300=3.3e-6,
...   alpha_T=-0.5,
...   N0=7.1e15,
...   A=1,
...   B=0,
...   C=1,
...   alpha=1
... )

References

Fossum, J. G., and D. S. Lee. “A physical model for the dependence of carrier lifetime on doping density in nondegenerate silicon.” Solid-State Electronics 25.8 (1982): 741-747.

Attributes

attrs

Methods

Inherited Common Usage

tau_300

alpha_T

N0

A

B

C

alpha

__hash__()

Hash method.