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Phys.: Condens. Matter"],"published-print":{"date-parts":[[2026,10,9]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    The non-Hermitian skin effect provides a powerful approach for controlling wave localization beyond Hermitian systems. However, whether skin-localized modes in non-parity-time (PT)-symmetric photonic systems can be remotely excited by a single real-frequency source remains unclear. Here, we investigate this problem in a non-Hermitian photonic Chern insulator composed of gyromagnetic rods with dielectric gain and loss. By decomposing the non-Hermitian component into PT-symmetric and PT-symmetry-breaking parts characterized by\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:mrow>\n                            <mml:mi>\u03b1<\/mml:mi>\n                          <\/mml:mrow>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    and\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:mrow>\n                            <mml:mi>\u03b2<\/mml:mi>\n                          <\/mml:mrow>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    , we establish the relationship between eigenmodes and real-frequency excited fields through the imaginary part of the Bloch wave vector. We find that remote excitation is mainly determined by the ratio\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:mrow>\n                            <mml:mi>\u03b2<\/mml:mi>\n                          <\/mml:mrow>\n                          <mml:mrow>\n                            <mml:mo>\/<\/mml:mo>\n                          <\/mml:mrow>\n                          <mml:mrow>\n                            <mml:mi>\u03b1<\/mml:mi>\n                          <\/mml:mrow>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    . For the structure studied here, more than\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:mn>80<\/mml:mn>\n                          <mml:mi mathvariant=\"normal\">%<\/mml:mi>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    of the field intensity can be localized within the rightmost column of unit cells when\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:mrow>\n                            <mml:mi>\u03b2<\/mml:mi>\n                          <\/mml:mrow>\n                          <mml:mrow>\n                            <mml:mo>\/<\/mml:mo>\n                          <\/mml:mrow>\n                          <mml:mrow>\n                            <mml:mi>\u03b1<\/mml:mi>\n                          <\/mml:mrow>\n                          <mml:mo>&lt;<\/mml:mo>\n                          <mml:mn>0.2<\/mml:mn>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    . Our results provide insights into wave excitation in non-PT-symmetric systems and guide the design of non-Hermitian photonic devices.\n                  <\/jats:p>","DOI":"10.1088\/1361-648x\/aea72c","type":"journal-article","created":{"date-parts":[[2026,9,14]],"date-time":"2026-09-14T22:54:18Z","timestamp":1789426458000},"page":"405701","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Edge states in non-Hermitian photonic Chern insulators: remote excitation with a real-frequency point source"],"prefix":"10.1088","volume":"38","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-4444-9522","authenticated-orcid":true,"given":"Heming","family":"Shen","sequence":"first","affiliation":[{"name":"Fudan University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yichen","family":"Li","sequence":"additional","affiliation":[{"name":"Fudan University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fanyong","family":"Liu","sequence":"additional","affiliation":[{"name":"Fudan University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-1801-7862","authenticated-orcid":true,"given":"Xinyu","family":"Zhao","sequence":"additional","affiliation":[{"name":"Donghua University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maoxiong","family":"Zhao","sequence":"additional","affiliation":[{"name":"Zhangjiang Laboratory"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3153-7612","authenticated-orcid":true,"given":"Xinhua","family":"Hu","sequence":"additional","affiliation":[{"name":"Fudan University"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"266","published-online":{"date-parts":[[2026,10,12]]},"reference":[{"key":"cmaea72cbib1","doi-asserted-by":"publisher","first-page":"5243","DOI":"10.1103\/PhysRevLett.80.5243","type":"journal-article","article-title":"Real spectra in non-Hermitian Hamiltonians having PT symmetry","volume":"80","author":"Bender","year":"1998","journal-title":"Phys. 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All rights, including for text and data mining, AI training, and similar technologies, are reserved.","name":"copyright_information","label":"Copyright Information"},{"value":"2026-08-10","name":"date_received","label":"Date Received","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2026-09-14","name":"date_accepted","label":"Date Accepted","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2026-10-12","name":"date_epub","label":"Online publication date","group":{"name":"publication_dates","label":"Publication dates"}}]}}