Infrared Polarimetric Studies of Star and Planet Forming Regions

We present recent polarimetric studies of star and planet forming regions in both wide-field and high resolution. The former is a first systematic wide-field (~8 arcmin) circular and linear polarization survey of star forming regions with IRSF/SIRPOL, which resulted in discovery of ubiquity of extended circular polarization in nebulae. The degrees and extents of the circular polarization has a clear trend with the masses of the forming stars. We also present a high resolution (<0.1 arcsec) polarization survey of protoplanetary disks with Subaru/HiCIAO, which resulted in successfully detecting the details of disks of the solar-system scale. They show gaps and/or spirals that can be regarded as signposts of young planets already formed in the disks.