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How I define Chi (2) 2nd order non linear succeptibilities

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Hi, I am using comsol 3.5a. I am working on terahertz generation technique. I need to define 2nd order nonlinear susceptibility on material. How do you define it? Can you please help me?


Thanks for any suggestion in advance.

0 Replies Last Post 28 set 2012, 12:23 GMT-4
COMSOL Moderator

Hello Raju Sinha

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