Non-Linear Biophotonic Crystal
The images above depict efficient second harmonic generation [SHG (green)] at the focus of a high numerical aperture objective (1.32). Traditional inorganic non-linear crystals are highly dependent on angle of incidence, wavelength and polarization; in this case the crystalline substance is angle independent and has a bandwidth ranging from 700 to 1300 nm wavelength with regard to SHG. The exotic photonic crystal in this case consists of starch granules derived from white rice.
- Karl Garsha , ITG, Beckman Institute