1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Electron and hole wavefunctions in a semiconductor QW

  1. Jan 1, 2010 #1
    1. The problem statement, all variables and given/known data
    I'm attempting to understand better how optical transistions occur in a QW (more specifically quantum cascade lasers) with and without an electric field.

    If an electron in the second excited state falls to the first, is it simply the transistion matrix between these two equations that determine the transistion rate or is the parity of the hole states also important? Does this matrix affect stimulated emission/absorption or is it only important because of the effect of spontaneous emision?

    2. Relevant equations

    3. The attempt at a solution
    http://www.iop.org/EJ/abstract/0022-3719/20/19/010" explains that 'transistions between opposite-parity electron and hole levels are forbidden' which tells me I'm not understanding correctly. I assumed that the electron only recombines with the hole state when it falls to the ground state, am I wrong?
    Last edited by a moderator: Apr 24, 2017
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted