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We study defect and surface states in PT-symmetric optical mesh lattices. Such localized states can emerge in both the real and complex domain and can exhibit peculiar properties that are otherwise unattainable in Hermitian systems.
Second Harmonic Generation, due to its surface selectivity, is a well suited tool to study the surface of nanoparticles. In this contribution we analyse and model experiments on SHG at dielectric, metallic and core-shell particles.
We investigate Second Harmonic Generation at the surface of nanoparticles both by modeling and experiment. We present an ab initio simulation method, which allows deducing surface properties as well as the nature of adsorbed molecules.
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