A reconfigurable add-drop multiplexer comprises an array of channel waveguides coupling two groups of diffractive element sets on a slab waveguide. One embodiment of such a workpiece, for example, includes a substrate having a plurality of microelectronic dies comprising integrated circuitry and bond-pads, such as copper bond-pads, electrically coupled to the integrated circuitry. The present invention is furthermore directed to the use of such inventive stimulus-responsive dissolvable PEG-hydrogels in the treatment of lesions, in surgical dressings, for wound treating, for soft and hard tissue regeneration, for the treatment of wounds in the oral cavity, in the field of ophthalmology, in the field of periodontal defects, etc. The fluted surface removes a composite material while the smooth tip serves as a guide for the bur. This delay signal then causes the electronic component to reduce its power consumption, thereby avoiding an overload on the power supply unit. The first and second shift registers are adapted to selectively shift their contents by a predetermined number of bits corresponding to the size of a data element, such as a pixel.