
Lecture 5

Quiz
•
Physics
•
University
•
Easy
Mentorstvo ITMO
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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What function describes the probability of filling with electrons of any level?
Fermi-Dirac
Bose- Einstein
Poisson
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What transitions are characterized by the fact that the momentum of the electron differs from the momentum of the hole?
Indirect transitions
Direct transitions
Intraband transitions
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The time of the superposition of electrons and holes Fermi levels in the p - n junction is ...
10-4 s
10-12 s
10-8 s
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Can lasers based on homojunction operate continuosly?
No
Only at high temperature
Only at low temperature
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the reason for the photon localization in the p-n junction region in double heterojunction lasers?
Total internal reflection
Population inversion
External voltage application
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The number of charge carriers in heterojunction lasers is ... in comparison with homojunction lasers.
higher
lower
comparable
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If a number of QD layers in the active layer increases, the threshold current ...
Increases
Decreases
Does not change
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