Ragib Ahsan

4 Questions 2 Answers 0 Followers

Questions related from Ragib Ahsan

Is tunneling probability for through an insulator barrier different for direct and indirect semiconductors?

Silicon has its conduction band minima closer to X valley and therefore the electron has a large lattice momentum. When we calculate tunneling probability normal to (100) surface through a barrier...

04 April 2020 7,610 0 View

How to determine if a semiconductor has anisotropic effective mass for electron from band structure? Does parabolic band mean isotropic eff. mass?

Quite often, transverse and longitudinal effective mass of electrons in Si and Ge are mentioned. Is there a way to find if a certain semiconductor has such directional nature for effective mass or...

28 December 2017 5,699 3 View

Possible applications of light induced negative differential resistance devices

I have been working on a silicon-based photodetector device that is exhibiting a light-induced negative differential resistance behavior. Depending on where light is incident, the peak to valley...

01 January 1970 7,141 3 View

Harmonics generation of an AC signal

In a semiconductor device that we are working on, we are observing that if we input an ac signal, the frequency of the signal can be doubled and tripled with some good efficiency. I have been...

01 January 1970 6,168 5 View