Optical Sciences

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-calix[4]arene 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 Si[0]N and optically nonlinear calix[4]arene 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 [4] arene layer thickness.
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