Figure 4
From: All-optical routing and switching for three-dimensional photonic circuitry
Measured polarisation-dependent all-optical routing and switching at a T-junction.
(a) An s-polarised low-power signal couples into both output branches when no blocker is present. (b) Activating the high power blocker beam results in deflection of the signal into the perpendicular branch of the T-junction (power ratio altered by ∼9dB). (c) A p-polarised low-power signal travels straight when no blocker is present. (d) The blocker beam causes back-reflection from the pivotal point into the input port, such that almost no light is deflected into the perpendicular branch (power ratio changed by ∼13dB). Note that each image has been rescaled to its maximum. The green arrow indicates the signal polarisation.
