PIXELLATION OF OPTO-THERMAL BISTABLE DEVICES FOR SWITCH POWER AND CROSSTALK REDUCTION A.K. KAR, R.M. HARRIS, G.S. BULLER, S.D. SMITH and A.C. WALKER J. Phys. Colloques, 49 C2 (1988) C2-443-C2-446 DOI: 10.1051/jphyscol:19882105