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Research objectives

The Complex Photonic Systems (COPS) group aims to control light and optical processes in nanophotonic structures, and strives for maximum scientific impact. We were among the first five groups worldwide (at present hundreds if not thousands) that initiated optical experiments on photonic bandgap crystals, and we have pioneered inverse opals, the most powerful crystals for visible light. We have opened a new field of research by shaping wavefronts to focus light in or beyond opaque media. We have performed pioneering studies on Anderson localization and diffusion of light. Our present research goals are: 

  • To focus light deep inside opaque metamaterials. 
  • To develop innovative imaging methods based on the control of optical wavefronts. 
  • To demonstrate “sweet spots” in photonic metamaterials where quantum systems such as quantum dots experience greatly enhanced or strongly inhibited light-matter interaction. 
  • To realize functional 3D photonic bandgap crystals with high-Q cavities by CMOS-compatible methods. 
  • To switch the properties of cavities at ultimate repetition rates and speeds. 
  • To have light propagate over unprecedented distances across imperfect photonic circuits. 
  • To explore novel opportunities for applications and fundamental science using interference in complex media.

Our research can be divided into five subjects, click on the names for a more detailed description:

Light propagation at the nanoscale
Spontaneous emission control
Ultrafast switching
Wavefront shaping of light

The Complex Photonic Systems chair has excellent facilities for its research. New laboratory spaces have been created for COPS in the Meander-building, in use since November 2010. These facilities include a ground floor laboratory with excellent characteristics, and a well-equipped chemical preparation facility. Our state of the art optics lab disposes of top of the range lasers, spectrometers, goniometers, and cryostats, and is maintained by excellent technicians. Read more about the facilities here. You can find a small image gallery here.