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This section provides some basic tips on preparing graphics for publications or ...hotos have Creative Commons type licenses. Unlike other generic clipart or photo collections there is a lot of scientifically useful image there. Many are p

...ntensities). This intensity dependence is at the origin of the interest in two-photon absorbing materials for use in microscopy and microfabrication appli == Two-Photon Excited Processes ==

...Since their pioneering work, photoconductive switches have become one of two popular methods of generation and coherent detection of bright THz pulses w ...ctive dipole antennae (PDA). Difference-frequency generation (DFG) between two different laser beams in a NLO material can also be used to generate THz ra