- #1
Karthiksrao
- 68
- 0
Hello,
At the interface between dielectrics and vacuum, there is always evanescent waves present (you can consider them as being generated due to total internal reflection of electromagnetic waves being generated by thermal fluctuation of charges inside the dielectric). In some cases you can have surface waves like surface polaritons as well, which greatly enhances thermal energy transfer when you bring two dielectric surfaces closely apart (due to coupling of these waves)
I was wondering, if there is any way to concentrate these waves to a tiny spot.. Can we use lenses, the way we use to concentrate any other light wave ?
Thanks!
At the interface between dielectrics and vacuum, there is always evanescent waves present (you can consider them as being generated due to total internal reflection of electromagnetic waves being generated by thermal fluctuation of charges inside the dielectric). In some cases you can have surface waves like surface polaritons as well, which greatly enhances thermal energy transfer when you bring two dielectric surfaces closely apart (due to coupling of these waves)
I was wondering, if there is any way to concentrate these waves to a tiny spot.. Can we use lenses, the way we use to concentrate any other light wave ?
Thanks!