|Message: Re: how to add complex refrative index for a dielectric-dielectric surface||Not Logged In (login)|
Click on the Forum title, e.g. on the "Forums by Category" page, to read a sequence of postings to the Forum and its threads all in one page. If you are only interested in one thread or the thread following a specific posting, click the thread or the posting, which takes you to a smaller page, which contains only the part you are interested in and may be easier to navigate.
Messages are "chained" if there are only replies at the first level, i.e. 1/1.html, 1/1/1.html etc. In case of "chained" messages the message number is replaced by the icon and there is no indentation.
Inline: Display the subject line only or also the text of the posting(s); for the choice "All" the "Outline" choices are switched off.
|1||0||1||no text / full text of posting|
|2||1||All||text for level 1 only / text for All postings|
Outline: Choose the depth of the posting thread, successive toggle controls provide increasing detail.
|1||2||1||2 levels / 1 level (original posting)|
|2||3||2||3 levels / 2 levels|
|3||3||All||3 levels / all levels (all postings)|
Hi, I cannot really add anything to my previous posting.
> A photon is generated in LiquidScintillator, and transported to the LiquidScintillator and Window (made of glass) interface. It reflected back or transmit through the interface. As the refrative index of window and LiquidScintillator are very closed, the photon is very likely to transmit through the interface.
Define this surface to be dielectric_dielectric and give the window only a real index of refraction.
> Because the Absortion length of glass is large, the photon is with little probability to be absorbed, instead, it travels to the window and photocathode (K2CsSb) interface. > > Because K2CsSb is some kind of semiconductor with non-ignorable imaginary part, which, will make a great difference to the reflectivity of the interface. If the photon is not reflected, it is expected to be transimitted through and absorbed, causing the photoelectric effect.
Make this surface dielectric_metal (e.g. think of your K2CsSb not as a semiconductor but as a 'metal' as far as G4 optical photon simulations are concerned.) Give this surface (or the K2CsSb material) the complex refractive index.
> > The problem is when I set the complex refrative index for the photocathode, the photons seems to disappeared once they get to the surface.
The only photons that should 'disappear' are the ones not reflected. You can find out what reflectivity is calculated by interrogating:
Your detected photos will be:
And, as I said, whether the photo detection happens in a semiconductor or a metallic photocathode, you should not think if them different in terms of the G4 simulation.
|Inline Depth:||Outline Depth:||Add message:|