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Question Boundary interaction model 

Forum: Processes Involving Optical Photons
Date: 11 Sep, 2012
From: Nicolas Di Vara <Nicolas Di Vara>

Hi,

I have been trying to assess the characteristics of boundary interaction in Geant4 using the condition "frontpainted" (both polished and ground) for the dielectric_dielectric interface. I specified the imaginary and real refractive index of the surface and used a random polarization for a gps with simple optical photons. As far as I have understood Geant4 uses Maxwell equations to extract the reflectivity from the complex index of refraction and the component of the incident field. (from http://geant4.web.cern.ch/geant4/UserDocumentation/UsersGuides/ForApplicationDeveloper/fo/AllResources/TrackingAndPhysics/physicsProcessOptical.src/GetReflectivity.pdf)

Now,this does not take into account the refractive index of the volume from which the particle comes. This is not quite clear to me, since I would expect something like the Fresnel equation with the refracted ray absorbed. Could you explain the model implemented and where I'm wrong?

Thank you Nicolas

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1 Feedback: Re: Boundary interaction model   (Gumplinger Peter - 18 Sep, 2012)
1 None: Re: Boundary interaction model   (Erik Dietz-Laursonn - 19 Sep, 2012)
(_ More: Re: Boundary interaction model   (Nicolas Di Vara - 19 Sep, 2012)
1 Feedback: Re: Boundary interaction model   (Gumplinger Peter - 19 Sep, 2012)
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2 More: Re: Boundary interaction model   (Sehwook Lee - 14 Nov, 2012)
2 None: Re: Boundary interaction model   (Sehwook Lee - 14 Nov, 2012)
1 None: Re: Boundary interaction model   (Erik Dietz-Laursonn - 15 Nov, 2012)
(_ None: Re: Boundary interaction model   (Sehwook Lee - 15 Nov, 2012)
(_ None: Re: Boundary interaction model   (Erik Dietz-Laursonn - 16 Apr, 2013)
(_ Warning: Re: Boundary interaction model   (Andrea Celentano - 16 Jan, 2015)
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