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.

 

Visualizing the whispering gallery modes in a cylindrical optical microcavity

(full pdf)

Balistreri MLM, Klunder DJW, Blom FC, Driessen A, Hoekstra HWJM, Korterik JP, Kuipers L, van Hulst NF
OPTICS LETTERS
vol 24 issue 24: p1829-p1831 DEC 15 1999

Whispering gallery modes in cylindrical integrated optics microcavities have, for what is to our knowledge the first time, been mapped with a photon scanning tunneling microscope. Optical images were obtained with a spatial resolution of 50 nm. By combination of information o­n the spatial optical distributions with wavelength-dependent measurements, an unexpectedly rich variety of intracavity phenomena, such as polarization conversion and interference of copropagating and counterpropagating modes, could be directly observed. A quantitative comparison of the experimental data with computer simulations results in a comprehensive understanding of the various whispering gallery modes inside the microcavity. (C) 1999 Optical Society of America. OCIS codes: 130.0130, 130.3120, 250.5750, 170.5810, 170.0110.
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