/46615/1.hassmallThumbnailVersion/A_Universal_Method_for_Constructing_N-Port_Reconfigurable_Non-Blocking_Optical_Switches_on_a_Silicon_Chip.pdf;/46615/1/A_Universal_Method_for_Constructing_N-Port_Reconfigurable_Non-Blocking_Optical_Switches_on_a_Silicon_Chip.pdf