How does exactly Excitons carry energy without transporting charge?

[eakadeh]

Hi guys

I'm a medical student and therefore I don't have much background in quantum physics, But I was reading an article about Excitonic Circuits related to optic medical instruments and I got curious to know how can an exciton transport energy and momentum, but not mass and charge, interacting with (or advancing through) a medium?

Edited August 8, 2018 by eakadeh

[mathematic]

https://www.photonics.com/a23970/Excitonic_Circuits_New_Tools_for_Manipulating

 

It's new to me, but the reference may help.

[Endy0816]

Its a quasiparticle. Excited electron and a hole. Once they meet again the electron is as it was.