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However, the excitation of these cavities typically relies on evanescent coupling within sub\u2010wavelength distances, limiting flexible and precise chip integration. Here, an on\u2010chip supercoupled topological cavity is demonstrated which is critically coupled at 2.3\u2010wavelength distance from a bus waveguide and remains excited even at 3.2 wavelengths, based on the supercoupling mechanism enabled by the valley vortex flow. Optothermal heating facilitates tunable quality factors and dynamic control of the supercoupling condition, allowing transitions from overcoupling to undercoupling through the critical point. The discovery extends the waveguide\u2010cavity excitation distance to multiple wavelengths, unlocking new possibilities for designing and controlling on\u2010chip resonant devices, including supercoupled lasers, sensors, and modulators.<\/jats:p>","DOI":"10.1002\/adma.202419261","type":"journal-article","created":{"date-parts":[[2025,4,11]],"date-time":"2025-04-11T10:37:56Z","timestamp":1744367876000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["On\u2010Chip Active Supercoupled Topological Cavity"],"prefix":"10.1002","volume":"37","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-0445-5227","authenticated-orcid":false,"given":"Ridong","family":"Jia","sequence":"first","affiliation":[{"name":"Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University  Singapore 637371 Singapore"},{"name":"Centre for Disruptive Photonic Technologies Nanyang 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