tidy3d.MultiValleyEffectiveDOS

class MultiValleyEffectiveDOS

Bases: EffectiveDOS

Effective density of states model that assumes multiple equivalent valleys and anisotropic effective mass. The model assumes the standard equation for the 3D semiconductor with parabolic energy dispersion:

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().

• m_eff_long (PositiveFloat) – Relative effective mass of the carriers in the longitudinal direction. This is a relative value compared to the electron mass at rest.

• m_eff_trans (PositiveFloat) – Relative effective mass of the carriers in the transverse direction. This is a relative value compared to the electron mass at rest.

• N_valley (PositiveFloat) – Number of effective valleys

Notes

\[N_{\text{eff}} = 2 N_{\text{valley}} \left( m_{\text{eff,long}} m_{\text{eff,trans}}^2 \right)^{1/2} \left( \frac{m_e k_B T}{2 \pi \hbar^2} \right)^{3/2}\]

Attributes

attrs

Methods

calc_eff_dos(T)

Abstract method to calculate the effective density of states.

Inherited Common Usage

m_eff_long

m_eff_trans

N_valley

calc_eff_dos(T)

Abstract method to calculate the effective density of states.

__hash__()

Hash method.