Biomolecules and nanostructures
The Optical Sciences group studies the interaction of light and matter. Our current focus is on detection and sensing/imaging with an emphasis on the development of integrated photonics. We are part of Twente University's Department of Science and Technology and member of the MESA+ institute.
Second-order nonlinear optical active calixarene polyimides suitable for frequency doubling in the UV region
Kenis PJA, Noordman OFJ, vanHulst NF, Engbersen JFJ, Reinhoudt DN, Hams BHM, vanderVorst CPJM
CHEMISTRY OF MATERIALS
vol 9 issue 2: p596-p601 FEB 1997
A new type of soluble calixarene-based polyimides was prepared by reaction of bis(3-aminopropyl) dipropyl functionalized tetranitrocalixarenes with hexafluoroisopropylidene diphthalic anhydride. Spin-coating of these polymers and subsequent electric field poling results in films that are highly transparent above 410 nm and exhibit high and thermally stable second harmonic generation coefficients. These properties make these materials very suitable Ear frequency-doubling applications in the UV region (820-410 nm).