Goos hänchen shift and phase shift

[taimoortalpur]

Dear All,
I am confusing total internal reflection for a light wave traveling from denser medium to lower dense medium. I know we get lateral shift i.e. goos hänchen shift with total internal reflection, but Do we have phase shift due to goos hänchen shift with total internal reflection. Because the light travel in the less denser medium for some distance equal to lateral shift.

Secondly the lateral shift or goos hanchen shift is due to energy conservation and energy associated with evanescent wave in less denser medium. Can anybody tell me how much energy is associated with evanescent wave, as I remember its zero. If possible kindly refer some sources.

Many Thanks for your consideraion...

 

[Claude Bile]

The phase shift that occurs at the interface is equivalent to laterally shifting the light ray.

The Goos Hanchen shift occurs due to the boundary conditions at the interface between two media. Emitted energy due to a evanescent wave is usually zero, but is not implicitly zero since there is a possibility that a photon tunneling can occur such that occurs in Near-field Scanning Optical Microscopy.

Claude.

 

[taimoortalpur]

Many Thanks for your elaborate response. It cleared me the concept.