I am curious to know a way that will make infrared pass through metals. Metals are good reflectors of infrared,can we manipulate the wave in order to make them pass through metals?.
[Physics] way to make infrared pass through metals
conductorselectromagnetic-radiationinfrared-radiationmetalsoptical-materials
Best Answer
If you have a metal that is thin enough (i.e. thinner than the infrared skin depth), then you can pass infrared light straight through. Keep in mind this would be metals with thicknesses of the order of tens to hundreds of nanometers depending on the metal. One way this could be easily achieved is careful sputtering of a metal film onto glass. Transparent conducting films somewhat fall under this type of category (though they work quite differently).
Alternatively, you can easily pass infrared light through some doped semiconductors (e.g. Silicon). These aren't as good as usual metals at conducting electricity, but can do the job in some situations.
If the idea is to take any random chunk of metal and try to pass infrared light through it, the best you can do is to drill a hole for a line-of-sight application, or fill that hole with an optical fiber when line-of-sight won't work.