supported by the Bundesministerium fur Bildung und Forschung(BMBF)Projects PHOIBOS(Grant 13N1257)and SPIDER(Grant 01DR18014A);by the Deutsche Forschungsgemeinschaft(DFG,German Research Foundation)under Germany´s Excellence Strategy via the Excellence Cluster 3D Matter Made to Order(EXC-2082/1-390761711);by the Helmholtz International Research School for Teratronics(HIRST);by the European Research Council(ERC Consolidator Grant‘TeraSHAPE’,#773248);by the H2020 Photonic Packaging Pilot Line PIXAPP(#731954);by the EU-FP7 project BigPipes;by the Alfried Krupp von Bohlen und Halbach Foundation;by the Karlsruhe Nano-Micro Facility(KNMF);by the Deutsche Forschungsgemeinschaft(DFG)through CRC#1173(‘WavePheonmena’).
Three-dimensional(3D)nano-printing of freeform optical waveguides,also referred to as photonic wire bonding,allows for efficient coupling between photonic chips and can greatly simplify optical system assembly.As a ke...