Define the characteristics of heterojunction laser, Physics

Assignment Help:

Define the characteristics of Heterojunction laser.

Heterojunction laser:

The threshold current density for homojunction lasers is extremely large because of poor optical and carrier confinement. Though, heterojunction lasers have high efficiency yet at room temperatures.
This is composed of different doping combinations of GaAs and AlGaAs. AlGaAs layers onto either side of GaAs function as potential barriers and give confinement for charge carriers to flow into the active region. Therefore, excitation and recombination can happen only within the active region.

1283_Heterojunction laser.png

Heterojunction laser


Related Discussions:- Define the characteristics of heterojunction laser

Brownian motion, Brownian motion (R. Brown; 1827) It is the continuous...

Brownian motion (R. Brown; 1827) It is the continuous random motion of solid microscopic particles while suspended in a fluid medium because of the consequence of ongoing bomb

What affect does electricity have on soil, What affect does electricity hav...

What affect does electricity have on soil? Electrical current and ions can cause definite molecules (and moisture) to adhere to soil. Large amounts of current, like a lightning

Physical significance of gradient of a scalar function, Explain the physica...

Explain the physical significance of gradient of a scalar function?

Find the speed of the bullet before impact, A 30g bullet strikes a .650kg b...

A 30g bullet strikes a .650kg block attached to a fixed horizontal spring whose spring constant is 5.90x10 3 N/m and sets it into vibration with an amplitude of 20.0cm. What was th

Equation for the equivalent capacitance, Derive mathematical equation for t...

Derive mathematical equation for the equivalent capacitance (Capacity) when capacitors are connected in series.

Magnitudes, if A=[30.1, 21.4 degrees] and B= [25, 40 degrees] what is the m...

if A=[30.1, 21.4 degrees] and B= [25, 40 degrees] what is the magnitude of the sum of these two vectors

Electromagnetism, Your friend has gifted an earphone set to you. While musi...

Your friend has gifted an earphone set to you. While music is on you will try to oppose the two ear phone pieces to attract. Task-I: Will they repel? If yes, why so? Task-II: Why S

Define circuit of rheostat, In the circuit shown in Figure, the slider S is...

In the circuit shown in Figure, the slider S is at the half-way point. (a) Calculate the p.d. across and the current flowing in the 400 Ω load resistor. (b) Is the circuit a

Atom, what is an atom

what is an atom

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd