Abstract
The simplest heterostructure laser is the double heterostructure laser.
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28.1
Efficiency of bipolar lasers. Compare the efficiency \(\eta \) of different types of GaAs bipolar lasers (double heterostructure laser, quantum wire laser, quantum dot laser, quantum well laser) driven at a current that is ten times larger than the threshold current. Assume, for simplicity, that the quantum efficiency is unity.
28.2
Explain qualitatively why the refractive index in the active regions of a GaAs junction laser is smaller than in the adjacent n-doped GaAs and p-doped GaAs regions.
28.3
Estimate the intensity of luminescence radiation (emitted into the whole space) of the lasers mentioned in Fig. 28.5.
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Renk, K.F. (2017). A Comparison of Semiconductor Lasers. In: Basics of Laser Physics. Graduate Texts in Physics. Springer, Cham. https://doi.org/10.1007/978-3-319-50651-7_28
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DOI: https://doi.org/10.1007/978-3-319-50651-7_28
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