# 01 - Tailoring diffusive transport of light

**Source**: https://www.cs.tum.de/spp1839/projects/1st-period-2015-2018/01.html
**Parent**: https://www.cs.tum.de/spp1839/projects.html

A large part of linear optics & photonics
aims at achieving specific functions of optical systems and devices by
molding the flow of light. In ballistic optics, this task is routinely
accomplished by tailoring spatial distributions of the refractive index
(tensor). In the case of disordered light-scattering media, the
situation used to be less clear. Broadly speaking, the aim of this
project is to solve this task by designing and realizing spatial
distributions of the light diffusivity (tensor). More specifically, we
focus on invisibility cloaking structures. Possible applications include
high-end security features and the homogenization of the light
emission from large-area OLEDs by making top metal contacts invisible.
The latter aspect is in collaboration with Uli Lemmer’s group in this
DFG-SPP.

## Contributors

- [Prof. Martin Wegener](https://www.aph.kit.edu/wegener/english/index.php)
- Andreas Niemeyer

## References

- Invisibility
  Cloaking in a Diffusive Light Scattering Medium, R. Schittny, M.
  Kadic, T. Bückmann, and M. Wegener, Science 345, 427 (2014)
- Transient
  behavior of invisibility cloaks for diffusive light propagation, R.
  Schittny, A. Niemeyer, M. Kadic, T. Bückmann, A. Naber, and M. Wegener,
  Optica 2, 84 (2015)
- Diffuse-light
  all-solid-state invisibility cloak, R. Schittny, A. Niemeyer, M. Kadic,
  T. Bückmann, A. Naber, and M. Wegener, Opt. Lett. 40, 4202 (2015)

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