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.


Photon scanning tunneling optical microscopy with a three- dimensional multiheight imaging mode

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Balistreri MLM, Korterik JP, Kuipers L, van Hulst NF
vol 77 issue 25: p4092-p4094 DEC 18 2000

A photon scanning tunneling microscope with a three-dimensional multiheight mode has been developed for the mapping of optical field distributions in integrated optical waveguide structures. The optical field is measured at different heights above the waveguide surface. The multiheight measurements also contain the optical information gathered with the commonly used constant gap measurements in addition to the topography of the waveguide surface. With the multiheight method, the decay length of the evanescent field is readily determined as function of the in-plane coordinate. Moreover, the evanescent light can be distinguished from scattered light. (C) 2000 American Institute of Physics. [S0003- 6951(01)02101-5].
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