Keywords: Optical rectification.svg en A schematic of an ionic crystal with no electric field top and with an AC electric field bottom The blurryness indicates the AC oscillation of the ions The red arrow indicates optical rectification The AC electric field not only causes an AC oscillation of the ions but also a DC shift of the ions' positions a shift that changes the time-average crystal polarization 2013-05-09 16 03 13 own Sbyrnes321 Made in Inkscape cc-zero Uploaded with UploadWizard Nonlinear optics Crystal o |