The　authors　have　investigated　various　photonic　processing　for　various　energy　devices　on　flexible　substrates　with　nanoinks.　For　printable　electronics,　different　conducting　nanoinks　are　developed,　including　silver　nanowires,　silver　nanoplates,　Cu-Ag　core-shell　nanoparticles,　graphene　oxide,　and　graphene.　The　authors　showed　that　these　inks　are　enabling　for　direct　writing　of　antenna　on　paper　for　radio　frequency　(RF)　energy　harvesting,　potentially　for　wireless　charging　application.　For　curing　printed　nanoinks　and　nanopastes,　the　authors　compared　four　kinds　of　methods:　chemical　activated　self-sintering,　thermal　sintering,　photonic　sintering　with　flash　light,　and　athermal　sintering　with　ultrafast　fiber　laser　irradiation.　The　authors　also　developed　an　innovative　and　facile　approach　to　fabricate　supercapacitors　on　flexible　substrates　with　femtosecond　laser　writing　and　photonic　reduction.　Aureduced　graphene　oxide　nanocomposite　is　used　for　electrical　electrodes　and　collectors.　Unlike　previous　studies,　collectors　are　fabricated　through　conventional　photolithography　gold　electrodes　is　directly　written　by　femtosecond　laser　reduction　of　Au　ions.　The　authors　found　that　gold　nanoparticles　can　be　well　sintered　on　the　surface　of　reduced　graphene.　The　reduced　graphene　also　work　as　glues　to　bridge　the　electrical　interconnection.　The　measured　conductivity　of　Au/reduced　graphene　reaches　10%　of　that　of　bulk　gold.　By　optimizing　an　interdigital　structure,　the　areal　capacitor　is　achieved　as　1.5　mF/cm(2).　(C)　2016　Laser　Institute　of　America.