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
Extraction of optical Bloch modes in a photonic-crystal waveguide(full pdf)
S. R. Huisman, G. Ctistis, S. Stobbe, J. L. Herek, P. Lodahl, W. L. Vos, and P. W. H. Pinkse
Journal of Applied Physics
vol 111 p033108 february 13, 2012
We perform phase-sensitive near-field scanning optical microscopy on photonic-crystal waveguides.
The observed intricate field patterns are analyzed by spatial Fourier transformations, revealing several guided transverse electric (TE) and transverse magnetic (TM) like modes. Using the reconstruction algorithm proposed by Ha et al. [Opt. Lett. 34, 3776 (2009)], we decompose the measured twodimensional field pattern in a superposition of propagating Bloch modes. This opens new possibilities to study specific modes in near-field measurements. We apply the method to study the transverse behavior of a guided TE-like mode, where the mode extends deeper in the surrounding photonic crystal when the band edge is approached. @copy; 2012 American Institute of Physics.