Right. It's allowed too pass light one way but absorb it the other. A
3-port microwave circulator does that:A --> B
B --> C
C --> A
which becomes an AtoB isolator if you terminate C.
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John
Optical diode, a one way light guide
Aug 05, 2011
30 Replies
Oops! The reflective properties vs film thickness was what I was thinking of. But, I now remember that it was not total reflection at all frequencies.
Sorry to get you excited :-)
John S
"Become opaque to".
It seems it is I that must spell things out!
... and therefore a true one-way mirror does not exist.
John Devereux
May i spell something out: light is a form of energy. Do with it whatever you want and you will find no violation of conservation of energy - no increase as you incorrectly implied.
Intelligence at last!
I do not think that the term "absorb" is correct..
OK, what is the correct term?
John
Choose: (a) reflect, (b) convert to another form of energy like heat as an example, (c) both.
(b) = absorb. As in "absorbtive filter"
John
I think the principle that a one-way mirror violates is thermodynamic (radiant heat transfer cannot be made one-way). I've got the Feynman book, where is this treated there?
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