|F.W.J. Fransoo, P. Bienstman, R. Baets
|Photonic IC for optical detection with sub wavelength resolution
|International Conference Proceedings
|IEEE/LEOS Benelux Chapter
|H. Thienpont, F. Berghmans, J. Danckaert, L. Desmet,
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To increase the information density on optical disks, the pit size should be decreased. In this paper we present theoretical results on how features smaller than the wavelength of the used light can be distinguished. Through a multimodal waveguide, light is focussed on the disk using a combination of the different modes. The light reflects on the disk and couples back into the modes of the waveguide. By using a photonic IC we can detect the variation of this mode to mode coupling, when the bit pattern is moved. From these variations, the bit information on the disk can be deduced.
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