How does the band filling effect work when current varies?
Kindly give a physical image of this effect.
Carrier flow (current) depends on the internal electrical field (voltage). The current intensity depends on the material conductivity, given by the doping concentration of the semiconductor material.
How does the ground state splitting in a mode locked laser effect the pulse width of the laser?
02 March 2015 5,317 1 View
I am working on mode locked laser using feedback from one facet to other facet. I am wondering what will happen if the light from both facet meet inside the fiber. Whether they will passes or they...
01 February 2015 5,207 6 View
What is Optical injection and optical pumping in laser
01 February 2015 888 2 View
In a two section laser which consists of gain and saturable absorber in which gain is connected to forward biased current and absorber is connected to the reversed biased voltage, mode locking...
01 February 2015 6,586 3 View
I have imported many file and want to put the FWHM of each file into Book1 (Excel). Is there any way manually or using command window.
01 February 2015 6,309 1 View
i am unable to interpret why its increases in start as shown in figure
11 August 2024 2,179 1 View
I am using Rhodamine6G as gain medium and silver nanoparticles as scatterers on a microscope slide and laser input 532 nm comes from above.
09 August 2024 9,894 2 View
If we map as a continuous motion an ionising electron (beginning its journey at n=1) in an H atom, a specific hyperbolic spiral appears (see animation). When we solve this spiral formula, we find...
07 August 2024 5,343 2 View
Let's say we have a standard, regular hexagonal honeycomb with a 3-arm primitive unit cell (something like the figure attached; the figure is only representative and not drawn to scale). The...
07 August 2024 1,937 1 View
I am interested to know the behavior of dyes toward light. Specifically, Blue dyes re-emit the spectrum, especially from the green zone (known as principal in LED lamps, and blue dyes are known...
05 August 2024 3,290 1 View
Dear all! Oxygen vacancies do raise negatively the Fermi level by increasing the negative charge in the semiconductor crystal structure. In the case of n-type semiconductors, I wonder if this...
30 July 2024 8,339 2 View
Hello, I'm trying to measure the conductivity of semiconductor films but since I don't have a commercial four point probe set up I would like to build one on my own in my lab. I have generators,...
30 July 2024 906 2 View
There are three operating parameters - the laser power, the diameter of the focus spot and the scanning speed. It is necessary to obtain a seam of a given depth without pores. What parameter...
27 July 2024 7,168 2 View
Consider the case of negligible gravity but there is an accelerating reference frame. Its origin traces out a trajectory, or world line, seen in some inertial reference frame. The Lorentz metric...
24 July 2024 1,608 15 View
Though much literature suggests fitting a Voigt profile on a LIBS peak, is it also possible to fit a Gaussian profile on the LIBS peak? I have 204 spectra files, and I am building a pipeline for...
23 July 2024 6,127 1 View