Lecture 5

Lecture 5

University

15 Qs

quiz-placeholder

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Lecture 5

Lecture 5

Assessment

Quiz

Physics

University

Easy

Created by

Mentorstvo ITMO

Used 5+ times

FREE Resource

15 questions

Show all answers

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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