QuantumATK Forum

QuantumATK => General Questions and Answers => Topic started by: ams_nanolab on August 6, 2015, 11:58

Title: Broadening value of optical spectra
Post by: ams_nanolab on August 6, 2015, 11:58

What should be the ideal value of the Broadening parameter in optical spectra calculator? How this would vary for say 2D and bulk materials?

Title: Re: Broadening value of optical spectra
Post by: zh on August 9, 2015, 03:40

It is hard to determine the ideal value of broadening parameter for all cases.  If you know the experiment spectra, you may tune the value of the broadening parameter in the simulated optical spectrum to make it match the experiment ones as much as as possible.
Please take a look at the following webpage for the background of broadening in different spectra lines:
https://en.wikipedia.org/wiki/Spectral_line_shape

Title: Re: Broadening value of optical spectra
Post by: ams_nanolab on August 10, 2015, 11:21

Okay, in this regard, what does a large or small broadening value have to signify? Does it sharpen / broaden the absorption peaks any way? Or does it more affect the position (energy) of the optical spectra/ absorption peaks?

Title: Re: Broadening value of optical spectra
Post by: Anders Blom on August 10, 2015, 13:53

Broadening, quite logically, affects the broadening, yes, and not the positions.