Origin of the thermal radiation in a solid-state analogue of a black hole
Origin of the thermal radiation in a solid-state analogue of a black hole
An effective black-hole-like horizon occurs for electromagnetic waves in matter at a surface of singular electric and magnetic permeabilities. In a physical dispersive medium the horizon disappears for wave numbers with $k>{k}_{c},$ and the effective geometry becomes flat. Nevertheless, it is shown that Hawking radiation is still emitted if free …