{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T18:54:52Z","timestamp":1790794492823,"version":"4.1.0"},"reference-count":59,"publisher":"American Association for the Advancement of Science (AAAS)","issue":"40","funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["62375253"],"award-info":[{"award-number":["62375253"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["62325507"],"award-info":[{"award-number":["62325507"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["62475252"],"award-info":[{"award-number":["62475252"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"National Key Research and Development Program of China Nos","award":["2024YFB4610700"],"award-info":[{"award-number":["2024YFB4610700"]}]},{"name":"National Key Research and Development Program of China Nos","award":["2021YFF0502700"],"award-info":[{"award-number":["2021YFF0502700"]}]}],"content-domain":{"domain":["www.science.org"],"crossmark-restriction":true},"short-container-title":["Sci. Adv."],"published-print":{"date-parts":[[2026,10,2]]},"abstract":"<jats:p>\n                    Controlling the direction of light emission on the subwavelength scale is a key to manipulating light and improving efficiency in optical sensing and quantum information processing. In functional metasurfaces, photonic spin angular momentum is widely used to control the propagation of light emission by geometric phase, but it is challenging to accomplish using monolayer materials because of lacking optical resonance in atomic thickness. Furthermore, the manipulation of the optical geometric phase based on spin angular momentum beams typically offers only two tunable states. Here, we report optical control of free-space routing of second harmonic generation in monolayer MoS\n                    <jats:sub>2<\/jats:sub>\n                    assisted by photonic orbital angular momenta. The experimental directionality of the second harmonic light can reach 0.84. Moreover, we can dynamically route the second harmonic generation signal on the engineered monolayer MoS\n                    <jats:sub>2<\/jats:sub>\n                    with four directions, showing high-order information encryption. Our findings thus provide great flexibility and more degrees of freedom in nonlinear optical modulation, integrated photonics, and dynamic flat optics.\n                  <\/jats:p>","DOI":"10.1126\/sciadv.aei3860","type":"journal-article","created":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T17:58:26Z","timestamp":1790791106000},"update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":0,"title":["Nonlinear directional emission on monolayer MoS\n                    <sub>2<\/sub>\n                    by optical orbit-orbit coupling"],"prefix":"10.1126","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-7064-2355","authenticated-orcid":true,"given":"Xianglong","family":"Wang","sequence":"first","affiliation":[{"name":"Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230027, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xinghao","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230027, China."},{"name":"Laser Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xueli","family":"Jiang","sequence":"additional","affiliation":[{"name":"Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230027, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shibo","family":"Xu","sequence":"additional","affiliation":[{"name":"Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230027, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhaohui","family":"Ye","sequence":"additional","affiliation":[{"name":"Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230027, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Liumiao","family":"Gao","sequence":"additional","affiliation":[{"name":"Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230027, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhenghong","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230027, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhiyuan","family":"Yan","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, Faculty of Science and Technology, University of Macau, Macau SAR, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9963-9917","authenticated-orcid":true,"given":"Chaowei","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230027, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yang","family":"Chen","sequence":"additional","affiliation":[{"name":"Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230027, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3950-6212","authenticated-orcid":true,"given":"Jiawen","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230027, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4468-6142","authenticated-orcid":true,"given":"Yanlei","family":"Hu","sequence":"additional","affiliation":[{"name":"Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230027, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0623-1515","authenticated-orcid":true,"given":"Dong","family":"Wu","sequence":"additional","affiliation":[{"name":"Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230027, 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