Li, ChiChiLiXing, KaijianKaijianXingZhai, WenhaoWenhaoZhaiSortino, LucaLucaSortinoTittl, AndreasAndreasTittlAharonovich, IgorIgorAharonovichFuhrer, Michael S.Michael S.FuhrerWatanabe, KenjiKenjiWatanabeTaniguchi, TakashiTakashiTaniguchiOu, QingdongQingdongOuDong, ZhaogangZhaogangDongMaier, Stefan A.Stefan A.MaierRen, HaoranHaoranRen2026-06-022026-06-022026Nature Photonics (in Press): (2026)https://hdl.handle.net/11420/63331In transition metal dichalcogenides, the valley degree of freedom directly couples valley-polarized excitons, excited by circularly polarized light to valley-dependent chiral photons, enabling ultrafast light-driven valleytronics. However, achieving fully integrated valley optoelectronics, incorporating on-chip in situ generation, selective routing and electrical readout of valley-dependent chiral photons, remains an unresolved challenge. Here we present a valley-driven hybrid optoelectronic nanocircuit that integrates chirality-selective meta-waveguide photodetectors with transition metal dichalcogenides. At room temperature, our purposely designed meta-waveguide device generates near-unity valley-dependent chiral photons in the second-harmonic generation from an encapsulated tungsten disulfide monolayer and selectively couples them to unidirectional waveguide modes, achieving an exceptional polarization selectivity of 0.97. These valley-dependent waveguide modes were subsequently detected by atomically thin few-layer tungsten diselenide photodetectors, exclusively responsive to the above-bandgap upconverted photons, thereby enabling all-on-chip processing of valley-multiplexed images. Our demonstration bridges a critical gap in lightwave valleytronics, paving the way for compact, programmable and scalable valley information processing and fostering the development of light-based valleytronic quantum technologies.en1749-48932026Technology::600: TechnologyJournal Article10.1038/s41566-026-01916-0