Biomolecules and nanostructures
The Optical Sciences group studies the interaction of light and matter at the nanoscale.
We do this by exploring ways to shape light and its environment. It's what we call
active and passive control. Our current focus is on the interaction of light with
biomolecules and nanostructures. We are part of Twente
University's Department of Science and Technology and member of the
Noncritically phase-matched second harmonic generation of blue light in Si[O]N-calixarene slab type waveguides
Worhoff K, Noordman OFJ, Albers H, Lambeck PV, vanHulst NF
vol 124 issue 5-6: p493-p499 MAR 15 1996
Phase-matching (TM(0)(omega) --> TM(1)(2 omega)) devices for generation of blue light using SiN and optically nonlinear calixarene layers are designed, fabricated and tested. The devices show second harmonic peak power of 17 mW at 472.9 nm and 4.5 W at 481.6 nm after 10 mm propagation length of a 1 mm broad beam using fundamental peak power of 200 W and 500 W, respectively. The strong requirements of noncritical phase match are fulfilled, in both design and realization, by the excellent process controllability of the passive Si[O]N waveguides and the insensitivity of the devices towards technologically critical parameters, mainly the calix  arene layer thickness.