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.

 

NOVEL CALIXARENES IN THIN-FILMS FOR EFFICIENT 2ND-HARMONIC GENERATION

(full pdf)

HEESINK GJT, VANHULST NF, BOLGER B, KELDERMAN E, ENGBERSEN JFJ, VERBOOM W, REINHOUDT DN
APPLIED PHYSICS LETTERS
vol 62 issue 17: p2015-p2017 APR 26 1993

Calix[4]arenes are a novel type of molecules for nonlinear optics. In a single molecule four pi-conjugated systems are combined. Corona poled guest-host polymer systems [calix[4]arenes-poly(methyl-methacrylate)] with transparency into the UV and loading up to 100% show a high degree of orientation. The maximum resonant d33 nonlinear coefficient measured at a fundamental wavelength of 590 nm is 51 pm/V. The d33 values of the thin films relax after poling to 65% of their maximum value. Results indicate self-organization of the molecules upon poling.
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