Optical Sciences

Biomolecules and nanostructures

The Optical Sciences group studies the interaction of light and matter at the nanoscale. We do this by exploring ways to shape light and its environment. It's what we call active and passive control. Our current focus is on the interaction of light with biomolecules and nanostructures. We are part of Twente University's Department of Science and Technology and member of the MESA+ institute.
We participate in the EU-COST actions MP1102: Coherent Raman microscopy (MicroCor) and CM1202: Supramolecular photocatalytic water splitting (PERSPECT-H2O)


Spectral investigation of a large-area 2D silicon photonic crystal slab for mid-IR radiation

(full pdf)

L Prodan, P Groß, R Beigang, L Kuipers and K-J Boller
Journal of Physics D
vol.40 p.5571-5579 aug 30 2007

A two-dimensional silicon photonic crystal (PhC), which is designed to provide a modified dispersion for photon energies of less than half of the electronic band gap of silicon, and which has been fabricated by laser interference lithography (LIL), is studied by angular dependent infrared reflectivity measurements. The resonance features, which we observe in the polarized reflectivity spectra, and which arise from resonant coupling of the infrared radiation to the leaky modes, are used to derive the probed leaky modes’ quality factor of the PhC fabricated by LIL.We also present photonic band structure calculations to reveal the bandgaps of the guided modes.
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