Posted by Rachael on June 8, 2015, 4:06 pm
Hi,
I've been looking at 2007 question 2, where for the last part of the question it asks which part of the dispersion relation for a diatomic chain can we study with light. Is it just where the dispersion relation for light intersects the dispersion relation for the chain (i.e. we can only study the optical mode with light as c=w/k), or is it something more complicated?
Thanks
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