Affiliation: | a Department of Electronics and Electrical Engineering, University of Glasgow, Oakfield Avenue, Rankine Building, Glasgow G12 8LT, United Kingdom b MacDermid Autotype Ltd, Grove Road, Wantage OX12 7BZ, United Kingdom c Institute of Photonics, University of Strathclyde, Wolfson Centre, 106 Rottenrow, Glasgow G4 0NW, United Kingdom d School of Electronics and Computer Science, University of Southampton, Southampton SO17 1BJ, United Kingdom e Sharp Laboratories of Europe Ltd, Oxford Science Park, Oxford OX4 4GB, United Kingdom |