Polarized radiation from disks

Magnetic field plays an important role in the dynamics and evolution of protoplanetary disks. Submm/mm wavelength radiation has been employed to detect magnetic field in disks. However, polarimetry observations from such disks on small scales show unphysical magnetic field structure together with some other problems. We will discuss scattering by dust grains as an alternative mechanism in producing submm/mm wavelength polarized radiation and related physics like grain growth.