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.
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.