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.
Characterization of total bend losses in dielectric loaded hybrid plasmonic waveguides (vacancy)
Plasmonic waveguides show promise for very high scale integration of photonic devices due to their ability to obtain very tight light confinement, which permits increasing device density, while benefiting of the large bandwidth of photonic devices. In order to achieve very large scale integration of photonic devices, bends are needed. Bends in different types of plasmonic waveguides, such as channel grooved plasmonic waveguides , metallic nanowire waveguides [2-3], metal-dielectricmetal plasmonic waveguides , dielectric-loaded surface plasmon waveguides , metal-clad waveguides  and hybrid dielectric-loaded surface plasmon waveguides  have been investigated with radii of a few micrometers. The total losses achieved, however, are too high for real-world applications. At the Optical Sciences (OS) Group, we have recently proposed the use of a thin metallic layer underneath a polymer waveguide to reduce the total bend losses of the structure for radii below 10 μm . As part of this ongoing project, you will be responsible for the experimental characterization of the total bend losses of the fabricated polymer hybrid plasmonic waveguides and of the comparison of the characterization results obtained with the theoretical simulations.
References S. I. Bozhevolnyi, V. S. Volkov, E. Devaux, J. Y. Laluet, and T. W. Ebbesen, "Channel plasmon subwavelength waveguide components including interferometers and ring resonators," Nature 440, 508-511 (2006).
 D. J. Dikken, M. Spasenovic, E. Verhagen, D. van Oosten, and L. Kuipers, "Characterization of bending losses for curved plasmonic nanowire waveguides," Opt. Express 18, 16112-16119 (2010).
 W. Wang, Q. Yang, F. Fan, H. Xu, and Z. L. Wang, "Light propagation in curved silver nanowire plasmonic waveguides," Nano Lett. 11, 1603-1608 (2011).
 D. F. P. Pile and D. K. Gramotnev, "Plasmonic subwavelength waveguides: next to zero losses at sharp bends," Opt. Lett. 30, 1186-1188 (2005).
 T. Holmgaard, and S. I. Bozhevolnyi, "Theoretical analysis of dielectric-loaded surface plasmon-polariton waveguides," Phys. Rev. B 75, 245405 (2007).
 M. W. Kim and P. C. Ku, "Lasing in a metal-clad microring resonator," Appl. Phys. Lett. 98, 131107 (2011).
 H. S. Chu, Y. Akimov, P. Bai, and E. P. Li, "Submicrometer radius and highly confined plasmonic ring resonator filters based on hybrid metal-oxide-semiconductor waveguide," Opt. Lett. 37, 4564-4566 (2012).
 M. A. Sefunc, A. Pace, M. Dijkstra, G. Sengo, S.M. García-Blanco, "Reduction of bend losses in polymer waveguides by thin metallic layers," accepted IEEE Photonics Benelux Annual meeting, Nov 2013.
PositionsCurrently, we have an open position for a MSc student on this project, refer to the OS vacancies