Commit 48ae8d63 authored by Isidora Araya's avatar Isidora Araya
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Update 14_doping_and_devices_solutions.md

parent cb2308fa
......@@ -82,13 +82,14 @@ $$E_e = E_c + \frac{\hbar^2 (k_x^2+k_y^2)}{2m_e^{\ast}}$$
$$E_h = E_v - \frac{\hbar^2 (k_x^2+k_y^2)}{2m_h^{\ast}}$$
### Subquestion 4
This is a 2D electron/hole gas. Apply 2D density of states.
This is a 2D electron/hole gas. Apply 2D density of states (constant).
$$g_e = \frac{4 \pi m_e^{\ast}}{\hbar^2}$$
$$g_h = \frac{4 \pi m_h^{\ast}}{\hbar^2}$$
### Subquestion 5
L can be found here for $k_x$ and $k_y$ using previous subquestions.
Setting $$ E_e - E_h - E_c + E_v = 1 eV = 2\frac{\hbar^2 (k_x^2+k_y^2)}{2m_e^{\ast}}$$
L can be found here for $k_x$ and $k_y$.
### Subquestion 6
For a laser one wants to fix the emission wavelength to a certain value. With
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