The problem is efficiency. Maxwell's equations are completely linear, so nonlinear optics relies entirely on materials with nonlinear response to optical fields. Unfortunately these responses deviate ...

Let’s start with some definitions: “Linear thinking is a systematic and analytical thought process that follows a known step-by-step progression similar to a straight line. Linear thinkers view a ...

How is that doubling and not squaring? Is that a domain-specific use of the word doubling that's different from the everyday one? Normally "doubling" would be the function f(x) = 2x. Click to expand..