Conference paper (2009) - A Hedden (author), H. Li (author), T.M. Klapwijk (author), T Zijlstra (author), H Mani (author), S Weinreb (author), E Tong (author), SN Paine (author), R Blundell (author), J Kawamura (author), C Groppi (author), C Kulesa (author), C Walker (author), G. de Lange (author)