Asrar Asghar

7 Questions 8 Answers 0 Followers

Questions related from Asrar Asghar

What are shallow and deep energ Which elements create deep and which create shallow levels? How do these states decrease charge carrier recombination?

21 August 2024 2,654 3 View

How to calculate intrinsic carrier concentration in GaP for following data?

At the values for the electron effective mass= 0.22 and the hole effective mass = 0.79, the dielectric constant =11.1, and band gap energy=2.26 for GaP, calculate the intrinsic carrier...

07 May 2020 7,313 4 View

What will be the projection operator to distinguish +45 and -45 polarization of photon?

i am trying to understand how a projection operator will differentiate between +45 polarization and -45 polarization?like for 45 polarization I can write 1/Sqrt2[H+V] and for -45 1/Sqrt2[H-V] the...

15 October 2015 7,838 3 View

Is it necessary to have normalized density matrix after applying different operators?

after projecting, density matrix becomes un-normalized. do we have to normalize it? or its ok to continue with un-normalized density matrix?

10 September 2015 1,272 4 View

Is there any difference in crystal structure for parametric down conversion type 1 and type 2?

is it crystal structure or some thing else that make polarization of daughter photon orthogonal in type 2 and parallel in type 1?

17 May 2015 8,296 7 View

What is the difference between single mode and multimode photon?

what is the difference between two? does multimode photon means a wave packet which contains waves of electric field oscillating at different frequencies ? and single mode photons have one wave...

16 May 2015 3,019 5 View

How one photon from pump beam is converted in two photons in parametric down conversion in a non linear crystal?

I want to know what is the physical process that happens inside crystal.

14 May 2015 4,739 3 View