Optical loss function vs energy-loss function? http://exciting.wikidot.com/forum/t-674664/optical-loss-function-vs-energy-loss-function Posts in the discussion thread "Optical loss function vs energy-loss function?" - confusion between the quantities. Mon, 16 Mar 2026 02:53:53 +0000 http://exciting.wikidot.com/forum/t-674664#post-1821988 Re: Optical Loss function vs energy-loss function? http://exciting.wikidot.com/forum/t-674664/optical-loss-function-vs-energy-loss-function#post-1821988 Fri, 26 Jul 2013 19:59:40 +0000 Robert N 1675344 I believe I have answered my own questions after a bit of searching.

]]> http://exciting.wikidot.com/forum/t-674664#post-1820638 Optical Loss function vs energy-loss function? http://exciting.wikidot.com/forum/t-674664/optical-loss-function-vs-energy-loss-function#post-1820638 Wed, 24 Jul 2013 21:31:00 +0000 Robert N 1675344 Looking at an optical loss function generated via TDDFT, it seems to resemble a VEELS (valence electron energy-loss function) or low-loss EELS.

However, If I take the dielectric functions computed via BSE, and understand that the intensity of the valence electron energy loss spectrum is related to the dielectric function by
I=-img(1/(e)) Where e is the dielectric function, and perform the conversion, I get a completely different graph.

What am I missing here?

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