{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,2]],"date-time":"2026-05-02T05:44:50Z","timestamp":1777700690188,"version":"3.51.4"},"reference-count":61,"publisher":"Wiley","issue":"23","license":[{"start":{"date-parts":[[2025,4,25]],"date-time":"2025-04-25T00:00:00Z","timestamp":1745539200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2025,4,25]],"date-time":"2025-04-25T00:00:00Z","timestamp":1745539200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/100000893","name":"Simons Foundation","doi-asserted-by":"publisher","award":["733700"],"award-info":[{"award-number":["733700"]}],"id":[{"id":"10.13039\/100000893","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanophotonics"],"published-print":{"date-parts":[[2025,11,2]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Recent studies have shown that low\u2010symmetry conductors under static electric bias offer a pathway to realize chiral gain, where the non\u2010Hermitian optical response of the material is controlled by the spin angular momentum of the wave. In this work, we uncover the topological nature of chiral gain and demonstrate how a static electric bias induces topological bandgaps that support unidirectional edge states at the material boundaries. In our system, these topological edge states consistently exhibit dissipative properties. However, we show that, by operating outside the topological gap, the chiral gain can be leveraged to engineer boundary\u2010confined lasing modes with orbital angular momentum locked to the orientation of the applied electric field. Our results open new possibilities for loss\u2010compensated photonic waveguides, enabling advanced functionalities such as unidirectional, lossless edge\u2010wave propagation and the generation of structured light with intrinsic orbital angular momentum.<\/jats:p>","DOI":"10.1515\/nanoph-2024-0681","type":"journal-article","created":{"date-parts":[[2025,4,24]],"date-time":"2025-04-24T09:04:12Z","timestamp":1745485452000},"page":"3991-4003","source":"Crossref","is-referenced-by-count":2,"title":["Topological chiral\u2010gain in a Berry dipole material"],"prefix":"10.1002","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7073-0987","authenticated-orcid":false,"given":"Filipa R.","family":"Prud\u00eancio","sequence":"first","affiliation":[{"name":"University of Lisbon \u2013 Instituto Superior T\u00e9cnico and Instituto de Telecomunica\u00e7\u00f5es Avenida Rovisco Pais 1 1049\u2010001 Lisbon Portugal"},{"name":"Instituto Universit\u00e1rio de Lisboa (ISCTE\u2010IUL) Avenida das For\u00e7as Armadas 376 1600\u2010077 Lisbon Portugal"}]},{"given":"M\u00e1rio G.","family":"Silveirinha","sequence":"additional","affiliation":[{"name":"University of Lisbon \u2013 Instituto Superior T\u00e9cnico and Instituto de Telecomunica\u00e7\u00f5es Avenida Rovisco Pais 1 1049\u2010001 Lisbon Portugal"}]}],"member":"311","published-online":{"date-parts":[[2025,4,25]]},"reference":[{"key":"e_1_2_14_2_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevb.23.5632"},{"key":"e_1_2_14_3_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevlett.49.405"},{"key":"e_1_2_14_4_1","doi-asserted-by":"publisher","DOI":"10.1103\/revmodphys.89.040502"},{"key":"e_1_2_14_5_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevlett.100.013904"},{"key":"e_1_2_14_6_1","doi-asserted-by":"publisher","DOI":"10.1103\/physreva.78.033834"},{"key":"e_1_2_14_7_1","doi-asserted-by":"publisher","DOI":"10.1038\/nature08293"},{"key":"e_1_2_14_8_1","doi-asserted-by":"publisher","DOI":"10.1038\/nphoton.2014.248"},{"key":"e_1_2_14_9_1","doi-asserted-by":"publisher","DOI":"10.1109\/JMMCT.2017.2654962"},{"key":"e_1_2_14_10_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevb.92.125153"},{"key":"e_1_2_14_11_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevlett.71.3697"},{"key":"e_1_2_14_12_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevb.84.125132"},{"key":"e_1_2_14_13_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevb.94.205105"},{"key":"e_1_2_14_14_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevx.9.011037"},{"key":"e_1_2_14_15_1","doi-asserted-by":"publisher","DOI":"10.1140\/epjst\/e2018\u2010800091\u20105"},{"key":"e_1_2_14_16_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41467\u2010018\u201005175\u20108"},{"key":"e_1_2_14_17_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevx.6.041026"},{"key":"e_1_2_14_18_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevlett.118.040401"},{"key":"e_1_2_14_19_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevlett.120.146402"},{"key":"e_1_2_14_20_1","doi-asserted-by":"publisher","DOI":"10.1088\/2399\u20106528\/aab64a"},{"key":"e_1_2_14_21_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevlett.121.086803"},{"key":"e_1_2_14_22_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevlett.121.136802"},{"key":"e_1_2_14_23_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevlett.121.026808"},{"key":"e_1_2_14_24_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41567\u2010020\u20100922\u20109"},{"key":"e_1_2_14_25_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41467\u2010019\u201012599\u20103"},{"key":"e_1_2_14_26_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevb.99.125155"},{"key":"e_1_2_14_27_1","doi-asserted-by":"publisher","DOI":"10.1038\/s42005-020-00482-3"},{"key":"e_1_2_14_28_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevlett.129.133903"},{"key":"e_1_2_14_29_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevb.109.l241406"},{"key":"e_1_2_14_30_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevb.97.115146"},{"key":"e_1_2_14_31_1","doi-asserted-by":"publisher","DOI":"10.3390\/sym13112229"},{"key":"e_1_2_14_32_1","doi-asserted-by":"publisher","DOI":"10.1109\/tmag.1968.1066210"},{"key":"e_1_2_14_33_1","doi-asserted-by":"publisher","DOI":"10.1109\/22.989957"},{"key":"e_1_2_14_34_1","doi-asserted-by":"publisher","DOI":"10.1038\/nphoton.2008.273"},{"key":"e_1_2_14_35_1","doi-asserted-by":"publisher","DOI":"10.1038\/ncomms3407"},{"key":"e_1_2_14_36_1","doi-asserted-by":"publisher","DOI":"10.1117\/1.ap.4.1.014002"},{"key":"e_1_2_14_37_1","doi-asserted-by":"publisher","DOI":"10.1088\/2053\u20101583\/3\/1\/015011"},{"key":"e_1_2_14_38_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsphotonics.8b00987"},{"key":"e_1_2_14_39_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11468\u2010020\u201001215\u20106"},{"key":"e_1_2_14_40_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41586\u2010021\u201003574\u20104"},{"key":"e_1_2_14_41_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41586\u2010021\u201003640\u2010x"},{"key":"e_1_2_14_42_1","doi-asserted-by":"publisher","DOI":"10.1109\/tmtt.2013.2238246"},{"key":"e_1_2_14_43_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevlett.124.257403"},{"key":"e_1_2_14_44_1","doi-asserted-by":"publisher","DOI":"10.1063\/1.113970"},{"key":"e_1_2_14_45_1","doi-asserted-by":"publisher","DOI":"10.1364\/josab.16.000267"},{"key":"e_1_2_14_46_1","doi-asserted-by":"publisher","DOI":"10.1088\/1367\u20102630\/13\/3\/033025"},{"key":"e_1_2_14_47_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevlett.128.013902"},{"key":"e_1_2_14_48_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevlett.130.076901"},{"key":"e_1_2_14_49_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevb.109.245126"},{"key":"e_1_2_14_50_1","doi-asserted-by":"publisher","DOI":"10.1017\/9781316662205"},{"key":"e_1_2_14_51_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevlett.115.216806"},{"key":"e_1_2_14_52_1","doi-asserted-by":"publisher","DOI":"10.1103\/revmodphys.82.1959"},{"key":"e_1_2_14_53_1","unstructured":"S.Lanneb\u00e8re N.Engheta andM. G.Silveirinha \u201cNon\u2010hermitian linear electro\u2010optic effect through interactions of free and bound charges \u201d arXiv:2503.09274."},{"key":"e_1_2_14_54_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevb.97.035158"},{"issue":"8","key":"e_1_2_14_55_1","first-page":"441","article-title":"Optical activity in tellurium induced by a current","volume":"29","author":"Vorob'ev E. L.","year":"1979","journal-title":"JETP Lett."},{"key":"e_1_2_14_56_1","doi-asserted-by":"publisher","DOI":"10.1134\/s1063783412120281"},{"key":"e_1_2_14_57_1","doi-asserted-by":"publisher","DOI":"10.1038\/ncomms4300"},{"key":"e_1_2_14_58_1","unstructured":"J. C.Serra N.Engheta andM. G.Silveirinha \u201cGain\u2010momentum locking in a chiral\u2010gain medium \u201d arXiv: 2410.08962."},{"key":"e_1_2_14_59_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.aaa9519"},{"key":"e_1_2_14_60_1","doi-asserted-by":"publisher","DOI":"10.1364\/optica.3.000118"},{"key":"e_1_2_14_61_1","doi-asserted-by":"crossref","unstructured":"S.Lanneb\u00e8re D. E.Fernandes T. A.Morgado andM. G.Silveirinha \u201cChiral\u2010gain photonics \u201dLaser Photonics Rev. nos.1\u201317 p.2400881 2025.","DOI":"10.1002\/lpor.202400881"},{"key":"e_1_2_14_62_1","doi-asserted-by":"publisher","DOI":"10.1103\/physrevapplied.22.l041003"}],"container-title":["Nanophotonics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1515\/nanoph-2024-0681","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1515\/nanoph-2024-0681","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1515\/nanoph-2024-0681","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,3,24]],"date-time":"2026-03-24T09:36:25Z","timestamp":1774344985000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1515\/nanoph-2024-0681"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,4,25]]},"references-count":61,"journal-issue":{"issue":"23","published-print":{"date-parts":[[2025,11,2]]}},"alternative-id":["10.1515\/nanoph-2024-0681"],"URL":"https:\/\/doi.org\/10.1515\/nanoph-2024-0681","archive":["Portico"],"relation":{},"ISSN":["2192-8614","2192-8614"],"issn-type":[{"value":"2192-8614","type":"print"},{"value":"2192-8614","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,4,25]]}}}