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.


Influence of hole size on the extraordinary transmission through subwavelength hole arrays

(full pdf)

K. L. van der Molen, F. B. Segerink, N. F. van Hulst, L. Kuipers
Applied Physics Letters
vol 85 number 19 nov 7 2004

We show that the extraordinary transmission of light through an array of square subwavelength holes is strongly influenced by the size of the holes. For small, square holes (air fraction below 20%), the dependence of the normalized transmission (transmissivity) on hole width greatly exceeds the expectations on the basis of conventional aperture theory. For larger holes, the transmissivity saturates. Moreover, the positions of the transmission maxima shift when the size is varied. copyright 2004 American Institute of Physics. [DOI: 10.1063/1.1815379]
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