The nonlinear-optical response scales with size of the system and the number of electrons. The intrinsic hyperpolarizability removes the effects of scaling so that molecules can be better compared with each other. Read more or see a short tutorial.
Breaching the gap
Until the mid-2000s, the best molecules were found to fall about a factor of 30 short of the fundamental limit. More recently, several groups have reported on molecules that come closer to the limit. Read more
Reversing Time's Arrow
Researchers use polymers to reverse the arrow of time. More
Learn about various topics in light-matter interactions from the basics of the polarizability to quantum calculations of nonlinear susceptibilities. Read more
Nonlinear susceptibility calculations often do not account for inhomogeneous broadening. A general theory of broadening that includes a stretched gaussian model has been reported. More
How good is your molecule?
Keep track of the molecules with the largest nonlinear-optical response and submit your data in the form described on the Tabulations Page.
Download useful source code; Origin, MatCad, and Matlab worksheets; and share code. Read more
Two-photon absorption may offer a better method for differentiating between good and bad cells. Studies in mice shows this approach to me a promising one for zapping tumors. Read more
High resolution micro-fabrication
Resins that photo-polymerize under two photon absorption can lead to higher resolution features due to the fact that the absorption probability scales as the square of the intensity profile. Read more
Get the latest news on new materials development, new technological advances, and updates on new physics of nonlinear optics. More